Staff Notes Daily Calendar Events

Tuesday, August 11, 2015 - 9:00am

August 11 - 14, 2015
NCAR Facility
3450 Mitchell Lane, Boulder, Colorado

GSI & EnKF - Starting Tuesday Morning on August 11 - 14, 2015
EnKF Only  - Starting Thursday Afternoon on August 13 - 14, 2015
                  GSI knowledge is required for the EnKF Only Session

The combined Gridpoint Statistical Interpolation and Ensemble Kalman Filter (GSI/EnKF) Community Data Assimilation System Tutorial will be offered at the NCAR Foothills Laboratory, in Boulder, Colorado on August 11-14, 2015. This will be the sixth Community GSI tutorial, but the first time EnKF will be included.

GSI is the operational data assimilation (DA) system being used by various national operational and research centers, including NOAA and the National Aeronautics and Space Administration (NASA). It is traditionally a three-dimensional variational DA system and has been extended to run with advanced features, including the hybrid ensemble-variational data assimilation technique and the four dimensional EnVAR technique.

The EnKF system is a Monte-Carlo algorithm for data assimilation that uses an ensemble of short-term forecasts to estimate the background-error covariance in the Kalman Filter. The EnKF uses the observation operators in the GSI system to transform model variables to observed variables in observation space. Therefore, the types of observations available for use in the EnKF match those for the GSI. Currently this EnKF is running operationally as part of the GSI based hybrid data assimilation system for the National Centers for Environmental Prediction (NCEP) global applications.

The combined GSI/EnKF Community Tutorial will be held over the four days of August 11-14. The GSI/EnKF tutorial will consist of both lectures and hands-on practical exercises. The lecturers are invited from various GSI and EnKF development/support teams including NCEP/EMC, NASA/GMAO, NOAA/GSD, NCAR/MMM and DTC. The practical sessions will provide the necessary skills to run both the GSI and EnKF systems for both basic and advanced implementations. The tutorial will be tailored to the upcoming release code (GSI and EnKF) scheduled for June, 2015

The tutorial consists of a combination of classroom lectures and a hands on practical session. We offer a choice of two registration options:

    Full GSI/EnKF Tutorial (4 days): $400 (includes lunch and refreshments)
    EnKF Only Tutorial (1.5 days): $130 (includes lunch and refreshments)

There will be NO refunds for cancellations made on, or after 3 PM MT on Friday July 31th, 2015. Prior to the July 31th deadline, we will refund the registration fee, less $25.00 to cover administrative costs.

To register use the link to reg-on-line (https://www.regonline.com/2015gsicommunitytutorialcopycopy) - More information can be found at the tutorial webpage (http://www.dtcenter.org/com-GSI/users/tutorials/2015.php)

If you have any questions or are unable to register please e-mail: MaryBeth Zarlingo (zarlingo@ucar.edu)
    
    - Due to seating limitations, the registration is limited to 40 participants.
    - 31 July, 2015: Last day to register if you need a temporary account on NCAR's Yellowstone computer for the hands on practical exercises.
    - Before 3 PM MT on Friday 31 July 2015, we will refund your registration fee less $25.00 to cover administrative fees.
    - After 31 July 2015, there will be no refunds.

We are looking forward to your attendance!

Presenter(s):
Dr. Hui Shao
Type of event:
Tutorial/Training
Building:
FL2
Room:
1022
Will this event be webcast by NCAR/UCAR?
No

Posted by Marybeth Zarlingo (zarlingo@ucar.edu) at x2751
Lab/division hosting the event:
NCAR
Affiliation or organization:
Wednesday, June 10, 2015 - 10:30am

Australia is a global hotspot of isoprene emissions during summer due to the high abundance of eucalypts in regions such as the Blue Mountains near Sydney. In the Model of Emissions of Gases and Aerosols from Nature (MEGAN), this isoprene-rich region is accounted for by a doubling of tabulated emission factor values for broadleaf trees. I’ve been examining these assumptions using three sets of field campaign data from the Sydney region.

A significant amount of work went into coupling the MEGAN code to our Australian chemical transport model (CTM). The CTM is used for regional air quality studies, and uses nests of successively higher resolution grid squares down to 1km. One of the greatest challenges was nesting MEGAN within this framework, and finding appropriate high resolution vegetation maps for Australia. My findings show a “Goldilocks” effect, in that modelled isoprene is too high, monoterpenes are too low, but methanol is about right.

Presenter(s):
Kathryn Emmerson
Type of event:
Seminar/Symposium
Building:
FL2
Room:
1001
Will this event be webcast by NCAR/UCAR?

Posted by Dianne Hodshon (dhodshon@ucar.edu) at x1401
Lab/division hosting the event:
NCAR, ACOM
Affiliation or organization:
Friday, June 19, 2015 - 10:00am

Since the beginning of numerical weather prediction it has been understood that mathematical theories can lead not only to deeper understanding but also improve numerical representation of the dynamics in atmosphere and ocean models.  The difficulties inherent in computational models have lead to, among other subjects, Charney's derivation of QG, theoretical investigations of the 'slow manifold' and later, nonlinear normal mode initialization for climate models.  In this talk the saga unfolds into the era of exascale computing by using mathematical theories developed for oscillatory partial differential equations to develop new numerical methods suitable to today's heterogeneous computing architectures. In this talk I plan to briefly explain how exascale computers are different than parallel computers and sketch the thinking behind a new parallel-in-time algorithm for computing equations used in weather and climate prediction.

Presenter(s):
Beth A. Wingate
Type of event:
Seminar/Symposium
Building:
Mesa Lab
Room:
Damon Room
Will this event be webcast by NCAR/UCAR?
No

Posted by Carolyn Mueller (cmueller@ucar.edu) at x2491
Lab/division hosting the event:
NCAR, CISL, IMAGe
Affiliation or organization:
Wednesday, June 10, 2015 - 11:00am

Climate Analysis Section Seminar

Date: June 10, 2015

Time: 11:00 am

Location: Mesa Lab Main Seminar room (ML132)

Speaker: Christoph C. Raible, University of Bern, Switzerland

Abstract:  

Atmospheric circulation modes such as the North Atlantic Oscillation (NAO) or the Pacific North America pattern (PNA) are important concepts in understanding the variability of atmospheric dynamics. Assuming their spatial patterns to be fixed, such modes are often described by simple indices from rather short observational data sets. The increasing length of reanalysis products but also millennium-scale simulations with complex Earth System Models allows these concepts and assumptions to be scrutinised. Using both data sources the stability of  the spatial patterns of Northern Hemisphere teleconnections are analysed in more details. The results show that the observed and simulated locations of the centres of action of the NAO and to some extent of the PNA, are not stable in time. The currently observed dipole pattern of the NAO, its centre of action over Iceland and the Azores, split into a north–south dipole pattern in the western Atlantic with a wave train pattern in the eastern part, connecting the British Isles with West Greenland and the eastern Mediterranean during the period 1940–1969 AD. The PNA centres of action over Canada are shifted southwards and over Florida into the Gulf of Mexico during the period 1915–1944 AD. The analysis further shows that shifts in the centres of action of either teleconnection pattern are not related to changes in the external forcing applied in transient simulations of the last millennium. Additionally, CMIP5 simulations show also no systematic change in the centres of action the Northern Hemisphere teleconnection patterns. Thus, we conclude that the variations are mainly internal driven. Besides the relevance of these variations is investigated in the context of proxy reconstructions as such shifts in their centres of action are accompanied by changes in the relation of local precipitation and temperature.

Presenter(s):
Christoph C. Raible
Type of event:
Seminar/Symposium
Building:
Mesa Lab
Room:
ML132 - Main Seminar Room
Will this event be webcast by NCAR/UCAR?
No

Posted by Teresa Foster (teresaf@ucar.edu) at x1741
Lab/division hosting the event:
NCAR, CGD
Affiliation or organization:
Friday, June 5, 2015 - 11:00am

Earlier occurrences of spring events have been reported from phenological markers over Europe without being explained thoroughly from a climate physics perspective. Based on a pure meteorological/dynamical approach, we present in this seminar a novel and objective definition of the season onsets corresponding to the calendar days where the correlation between daily European atmospheric circulation and temperature anomalies switches sign. High atmospheric pressure anomalies over Northern Europe, often referred to as anticyclonic blocking conditions, are indeed associated with cold spells in winter but heat waves in summer over most of the continent. According to this simple metrics assessed from several observational datasets, we first provide robust evidence for an earlier summer onset by ~10 days between the 1960s and 2000s. We then conduct a detection-attribution study based on model ensemble simulations and suggest that this calendar advance is incompatible with the sole internal climate variability and can be attributed to the increased greenhouse gases warming effect mitigated by anthropogenic aerosols. Late winter snow disappearance over Eastern Europe, currently at a tipping point according to both observational and model estimates, is responsible remotely for the present-day and near-future winter shortening over Western Europe. Local altered land-sea contrast interplays later on from ~2050 leading to a total reduction of ~25 days by 2100 based on business-as-usual scenario. Our findings provide a physically based explanation for descriptive phenological changes and helpful insights of the overall disruption of the European climate seasonal pace, e.g. the decrease (increase) in daily winter (summer) temperature variance.

Presenter(s):
Christophe Cassou, CERFACS
Type of event:
Seminar/Symposium
Building:
Mesa Lab
Room:
Main Seminar Room
Will this event be webcast by NCAR/UCAR?
Yes - ML-Main Seminar Room - http://ucarconnect.ucar.edu/live

Posted by Gaylynn Potemkin (potemkin@ucar.edu) at x1618
Lab/division hosting the event:
NCAR, CGD
Wednesday, June 24, 2015 - 3:00pm

Simulations of Magnetic Flux Emergence

Magnetic flux emerges from the solar surface on a wide range of scales.  We simulate the emergence of magnetic flux through the solar surface to form mini-active regions using a compressible, 3D, radiation-MHD, finite-difference code -- STAGGER.

We represent the magnetic flux produced by the global dynamo as uniform, untwisted, horizontal field advected into the simulation domain by supergranule scale inflows at the bottom.  Our computational domain extends from the temperature minimum (half a megameter above the visible surface) to 20 Mm below the surface, which is 10% of the depth of the convection zone, but contains 2/3 of its scale heights.  We investigate how magnetic flux rises through the upper solar convection zone and emerges through the surface.

Convective up-flows and magnetic buoyancy bring field toward the surface.  Convective down-flows pin down field and prevent its rise. Most of the field gets pumped downward by the convection, but some field rises to the surface.  The convective motions both confine the flux concentrations (without the need for twist) and shred them. This process creates a hierarchy of magnetic loops with smaller loops riding "piggy-back", in a serpentine pattern, on larger loops.  As a result, magnetic flux emerges in a mixed polarity, "pepper and salt" pattern.  The small loops appear as horizontal field over granules with their vertical legs in the bounding intergranular lanes.  The fields are quickly swept into the intergranular lanes. As the larger, parent, flux concentrations reach the surface with their legs rooted in the the downflow boundaries of the underlying, supergranule-scale, convective cells near the bottom of the simulation domain, the surface field counter-streams into separate, opposite polarity concentrations, creating pores and spots.

We compare two flux emergence events, one where the magnetic field is buoyant (5 kG at 20 Mm depth) and the other where it is not (1 kG at 20 Mm depth).  The above features are common to both cases. The primary difference is that the strong field alters the convective topology.  The weak field, non-buoyant unipolar flux concentration separation remains constant, located over the downflows at the edges of the undistorted, underlying supergranule-scale convective cells.  The strong magnetic field elongates the supergranule-scale convective cells in the direction of the field, which makes the opposite polarity flux concentrations that emerge through the surface spread apart, Further, in the strong field case one of the polarities is located over the intermediate depth, meso-granule-scale convective cell downflow boundaries rather than the deeper supergranule-scale cell boundaries, at least so far. Also, as expected, the buoyant flux rises to the surface much faster.

The subsurface magnetic field topology of the surface mini-active regions is very varied, indicating that almost every model proposed for active regions is probably correct for some case.  In all cases, the subsurface magnetic field lines of the pores and spots formed by the magneto-convection (without being imposed as an initial condition) are braided, some tightly, some loosely.  Some flux concentrations remain coherent, although twisted, down to the bottom of the computational domain.  Others break up into separate strands that twist about each other.  Still others only keep their coherence through part of the depth of the domain before connecting to surrounding field.

No webcast 

Presenter(s):
Bob Stein
Type of event:
Seminar/Symposium
Building:
CG1
Room:
2139
Will this event be webcast by NCAR/UCAR?
No

Posted by Sheryl Shapiro (sheryls@ucar.edu) at x1567
Lab/division hosting the event:
NCAR, HAO
Affiliation or organization:
Wednesday, June 3, 2015 - 3:00pm

What vector magnetic field measurements tell us uniquely

I will present some of our recent works, as two examples, to show what the vector magnetic field measurement can tell us uniquely. I will first show how the current helicity characters, obtained from vector magnetic field measurement, can put constrains on solar dynamo processes in the convection zone. Observations on current helicity show that the hemispheric helicity sign rule presents clearly on the photosphere, but this rule has a solar-cycle variation, with strong and weak magnetic fields show opposite helicity signs. On the other hand, by local helioseismology no solar-cycle variation presents on subsurface kinetic helicity. These pose a question on how could a solar-cycle-independent kinetic helicity produce a solar-cycle-dependent current helicity. And we are motivated to propose a model of helicity production in relation to the depth variation of kinetic helicity in the convection zone.

In the second part, I will present our observations and analyses that lead us to conclude that impulsive magnetic helicity injections observed on the photosphere are the imprints of flare-associated magnetic implosions. Using high-temporal (45s) HMI magnetograms and four X-class flares as an example, we show that impulsive magnetic helicity injections are evidently present and they are all related to the permanent increase of horizontal magnetic fields after solar flares. The two phenomena are both the observable imprints of magnetic implosions, both of which are also present in Fan (2010) MHD simulation.

This event will not be webcast or recorded.

Presenter(s):
Mei Zhang
Type of event:
Seminar/Symposium
Building:
CG1
Room:
2139
Will this event be webcast by NCAR/UCAR?
No

Posted by Sheryl Shapiro (sheryls@ucar.edu) at x1567
Lab/division hosting the event:
NCAR, HAO
Affiliation or organization:
Wednesday, June 10, 2015 - 3:00pm

Ellerman bombs per IRIS and LTE

Ellerman bombs (EB) are small shortlived brightenings of the extended Halpha wings that result from photospheric reconnection in solar active regions with much bipolar flux emergence. I will review their properties and visibilities in diverse diagnostics, ending with recent ultraviolet spectrometry with IRIS (ApJ, in press). I will then use the unorthodox assumption of LTE to explain many aspects of their extraordinary visibilities. I will also treat FAFs (small flaring arch filaments) which are EB siblings but of larger potential interest because they affect the higher atmosphere.


Webcast at https://ucarconnect.ucar.edu/live?room=cg12126

Presenter(s):
Rob Rutten
Type of event:
Seminar/Symposium
Building:
CG1
Room:
2126
Will this event be webcast by NCAR/UCAR?

Posted by Sheryl Shapiro (sheryls@ucar.edu) at x1567
Lab/division hosting the event:
NCAR, HAO
Wednesday, June 24, 2015 - 8:00am, Thursday, June 25, 2015 - 8:00am, Friday, June 26, 2015 - 8:00am
NCAR GIS Program BRIGHTE Workshop Series

Extreme weather and climate change impacts vary among different communities and populations, therefore addressing these problems requires spatial thinking and knowledge on integration of climate science and meteorology with Geographic Information Systems (GIS).  Significant progress has been made in the past several years in linking GIS with atmospheric and related sciences and their datasets. There is growing recognition among college and university-level meteorology educators that GIS is an extremely useful tool for atmospheric research and analysis. The intersection of GIS, weather, climate and societal impacts becomes essential when students are learning about interdisciplinary problems that their communities face. However, there is a noticeable lack of not only specific courses that teach the integration of GIS with atmospheric sciences, but perhaps more importantly the resources, such as lab manuals or published exercises, which demonstrate these concepts.

The goal of a 3-day NCAR-sponsored workshop is to provide university/college faculty from meteorology/atmospheric science departments with necessary knowledge to teach introductory GIS concepts and tools in their classrooms. "Incorporating GIS into the Atmospheric Science Curriculum" workshop will consist of hands-on GIS exercises, lectures, discussions, review of published and on-line materials, and working group projects. All data used in the lab exercises will consist of weather, climate, hydrologic, and socio-economic data, making the content not only interesting but very relevant to meteorology/atmospheric science majors. The workshop hands-on training will include: Introduction to GIS Concepts and Methods; Introduction to Esri’s ArcMap and ArcCatalog; Exploring Spatial Data Formats in ArcGIS; Data Symbology and Classification; Cartographic Mapping; Working with Coordinate Systems; and Working with Multidimensional Atmospheric Data.

Climate change adaptation, preparedness for weather extremes, and developing sustainable solutions and practices are important topics for every community in the United States. These complex, interdisciplinary problems require that representatives from all communities are engaged in the sciences and the decision-making process. We invite meteorology/atmospheric science faculty who are interested in incorporating GIS concepts and tools into meteorology, climatology or atmospheric science curriculum. Faculty from U.S. junior colleges, Historically Black Colleges and Universities, Tribal Colleges, and Hispanic-Serving institutions are encouraged to apply.

Application deadline is May 22, 2015. Selected participants will be notified of their acceptance by May 29th, 2015. All selected participants will receive travel support and per diem.

Presenter(s):
NCAR GIS Program
Type of event:
Workshop
Building:
Foothills Labs
Will this event be webcast by NCAR/UCAR?
No

Posted by Lara Ziady (ziady@ucar.edu) at x8442
Lab/division hosting the event:
NCAR, GIS, RAL, CSAP
Affiliation or organization:
Wednesday, June 24, 2015 - 8:00am, Thursday, June 25, 2015 - 8:00am, Friday, June 26, 2015 - 8:00am
NCAR GIS Program BRIGHTE Workshop Series

Extreme weather and climate change impacts vary among different communities and populations, therefore addressing these problems requires spatial thinking and knowledge on integration of climate science and meteorology with Geographic Information Systems (GIS).  Significant progress has been made in the past several years in linking GIS with atmospheric and related sciences and their datasets. There is growing recognition among college and university-level meteorology educators that GIS is an extremely useful tool for atmospheric research and analysis. The intersection of GIS, weather, climate and societal impacts becomes essential when students are learning about interdisciplinary problems that their communities face. However, there is a noticeable lack of not only specific courses that teach the integration of GIS with atmospheric sciences, but perhaps more importantly the resources, such as lab manuals or published exercises, which demonstrate these concepts.

The goal of a 3-day NCAR-sponsored workshop is to provide university/college faculty from meteorology/atmospheric science departments with necessary knowledge to teach introductory GIS concepts and tools in their classrooms. "Incorporating GIS into the Atmospheric Science Curriculum" workshop will consist of hands-on GIS exercises, lectures, discussions, review of published and on-line materials, and working group projects. All data used in the lab exercises will consist of weather, climate, hydrologic, and socio-economic data, making the content not only interesting but very relevant to meteorology/atmospheric science majors. The workshop hands-on training will include: Introduction to GIS Concepts and Methods; Introduction to Esri’s ArcMap and ArcCatalog; Exploring Spatial Data Formats in ArcGIS; Data Symbology and Classification; Cartographic Mapping; Working with Coordinate Systems; and Working with Multidimensional Atmospheric Data.

Climate change adaptation, preparedness for weather extremes, and developing sustainable solutions and practices are important topics for every community in the United States. These complex, interdisciplinary problems require that representatives from all communities are engaged in the sciences and the decision-making process. We invite meteorology/atmospheric science faculty who are interested in incorporating GIS concepts and tools into meteorology, climatology or atmospheric science curriculum. Faculty from U.S. junior colleges, Historically Black Colleges and Universities, Tribal Colleges, and Hispanic-Serving institutions are encouraged to apply.

Application deadline is May 22, 2015. Selected participants will be notified of their acceptance by May 29th, 2015. All selected participants will receive travel support and per diem.

Presenter(s):
NCAR GIS Program
Type of event:
Workshop
Building:
Foothills Labs
Will this event be webcast by NCAR/UCAR?
No

Posted by Lara Ziady (ziady@ucar.edu) at x8442
Lab/division hosting the event:
NCAR, GIS, RAL, CSAP
Affiliation or organization:
Wednesday, June 24, 2015 - 8:00am, Thursday, June 25, 2015 - 8:00am, Friday, June 26, 2015 - 8:00am
NCAR GIS Program BRIGHTE Workshop Series

Extreme weather and climate change impacts vary among different communities and populations, therefore addressing these problems requires spatial thinking and knowledge on integration of climate science and meteorology with Geographic Information Systems (GIS).  Significant progress has been made in the past several years in linking GIS with atmospheric and related sciences and their datasets. There is growing recognition among college and university-level meteorology educators that GIS is an extremely useful tool for atmospheric research and analysis. The intersection of GIS, weather, climate and societal impacts becomes essential when students are learning about interdisciplinary problems that their communities face. However, there is a noticeable lack of not only specific courses that teach the integration of GIS with atmospheric sciences, but perhaps more importantly the resources, such as lab manuals or published exercises, which demonstrate these concepts.

The goal of a 3-day NCAR-sponsored workshop is to provide university/college faculty from meteorology/atmospheric science departments with necessary knowledge to teach introductory GIS concepts and tools in their classrooms. "Incorporating GIS into the Atmospheric Science Curriculum" workshop will consist of hands-on GIS exercises, lectures, discussions, review of published and on-line materials, and working group projects. All data used in the lab exercises will consist of weather, climate, hydrologic, and socio-economic data, making the content not only interesting but very relevant to meteorology/atmospheric science majors. The workshop hands-on training will include: Introduction to GIS Concepts and Methods; Introduction to Esri’s ArcMap and ArcCatalog; Exploring Spatial Data Formats in ArcGIS; Data Symbology and Classification; Cartographic Mapping; Working with Coordinate Systems; and Working with Multidimensional Atmospheric Data.

Climate change adaptation, preparedness for weather extremes, and developing sustainable solutions and practices are important topics for every community in the United States. These complex, interdisciplinary problems require that representatives from all communities are engaged in the sciences and the decision-making process. We invite meteorology/atmospheric science faculty who are interested in incorporating GIS concepts and tools into meteorology, climatology or atmospheric science curriculum. Faculty from U.S. junior colleges, Historically Black Colleges and Universities, Tribal Colleges, and Hispanic-Serving institutions are encouraged to apply.

Application deadline is May 22, 2015. Selected participants will be notified of their acceptance by May 29th, 2015. All selected participants will receive travel support and per diem.

Presenter(s):
NCAR GIS Program
Type of event:
Workshop
Building:
Foothills Labs
Will this event be webcast by NCAR/UCAR?
No

Posted by Lara Ziady (ziady@ucar.edu) at x8442
Lab/division hosting the event:
NCAR, GIS, RAL, CSAP
Affiliation or organization:
Monday, July 13, 2015 - 8:00am

July 13-16, 2015 | NCAR Foothills Laboratory, Boulder, Colorado

The 2015 NCAR/CDC Workshop on Climate and Health will focus on vector-borne diseases related to human health. This workshop will focus on a wide variety of vector-borne diseases, including dengue, Lyme, and plague, and their relationship to climate variability and change. The purpose of the workshop is to train health professionals and early career climate and health researchers (public health officials, graduate students, post-docs and early career scientists and faculty) in the development of robust interdisciplinary research projects in the complex area of climate and health. The four-day workshop will include lectures on relevant topics in climate and climate change and in public health and human health, vulnerability studies, modeling climate and health, and special tools for analysis (e.g., GIS). There will be multiple opportunities for discussions with experts in the field in order to bring public health practitioners and climate scientists together to examine the integration of epidemiology, ecology, behavioral science, modeling and atmospheric science.

Applications Open through April 30.

Participants will be notified in early May.

Sponsored By:

National Center for Atmospheric Research
Centers for Disease Control and Prevention

Presenter(s):
CDC and NCAR
Type of event:
Workshop
Building:
Foothills Labs
Will this event be webcast by NCAR/UCAR?
No

Posted by Lara Ziady (ziady@ucar.edu) at x8442
Lab/division hosting the event:
NCAR, RAL, CSAP
Affiliation or organization:
Thursday, June 4, 2015 - 3:30pm

Margaret A. LeMone
National Center for Atmospheric Research, Boulder, Colorado
With significant contributions from Mike Barlage, Fei Chen, and Bingcheng Wan, RAL


Observations, offline Noah-MP land-surface model runs, and high-resolution WRF simulations are analyzed to isolate the effects of vegetation and soil damage by the 2002 Hayman Fire on the diurnal changes in temperature eight years later. The observations, two 48-hour sequences of hourly- to 2-hourly radiosonde releases and high-frequency surface data taken during fair weather as part of the 2010 BEACHON experiment in middle to late August, were collected at two sites at similar elevations: Hayman, in a severely-burned area near the center of the fire scar, and Manitou, in similar terrain but outside the fire scar, roughly 15 km to the southeast of Hayman. While the Manitou site had Ponderosa Pine and some leaf litter on the ground, Hayman was left with charred tree trunks, bare soil, and grassy vegetation.

Daytime temperatures and temperature profiles at the two sites were similar during the day, but Hayman remained warmer at night, up to about 500 m. Offline runs with the Noah-MP land surface model with the two types of vegetation and varying organic-matter profiles in the soil confirmed our suspicion that the warmer near-surface temperatures at Hayman could be traced to the lack of insulation (organic matter) in the soil, i.e., the heat absorbed by the soil during the day and over the summer kept the air warmer at night. Two WRF simulations – one with vegetation in the fire scar identical to that observed at Hayman, and one with the vegetation in its pre-fire state – were run to see whether terrain-induced airflow and cold-air pooling were additional factors in the difference. Almost perfect replication of observed night-time surface temperatures plus strong “fire”-“no fire” temperature differences at Hayman despite very similar night-time airflow suggest a strong role by surface vegetation. However, the strong Hayman-Manitou temperature differences were more focused on the lowest grid point than observed, as were the “fire”-“no fire” differences at Hayman. Also, the simulated cooling at Manitou was more modest than observed, suggesting either unsimulated cold-air pooling or locally cooler air in the bare spot where the balloons were released, compared to the nearby stand of trees.

This seminar will be webcast live at:
http://www.fin.ucar.edu/it/mms/fl-live.htm

Recorded seminar link can be viewed here:
https://www.mmm.ucar.edu/events/seminars

Thursday, 4 June 2015, 3:30 PM
Refreshments 3:15 PM
NCAR-Foothills Laboratory
3450 Mitchell Lane
Bldg 2 Main Auditorium, Room 1022

Presenter(s):
Margaret A. LeMone
Type of event:
Seminar/Symposium
Building:
FL2
Room:
1022
Will this event be webcast by NCAR/UCAR?

Posted by Michelle Menard (menard@ucar.edu) at x8189
Lab/division hosting the event:
NCAR, MMM
Affiliation or organization:
Monday, June 22, 2015 - 8:00am, Tuesday, June 23, 2015 - 8:00am, Wednesday, June 24, 2015 - 8:00am, Thursday, June 25, 2015 - 8:00am

The Unidata Users Committee invites you to join Unidata staff, community members, and distinguished speakers this June for a workshop is to raise awareness of important new trends in geoscience technology, including cloud computing, data management, and the place of the Python language in geoscience computing infrastructure. The workshop is a chance for the academic community to share hands-on activities, course materials, and ideas for improving research and education.

The workshop, titled Data-Driven Geoscience: Applications, Opportunities, Trends, and Challenges, will be held June 22-25, 2015 at CG 1.

The workshop will feature oral presentations, hands-on demonstrations of Unidata and related technologies, collaborative work sessions, and a poster session for those who wish to share their work with workshop participants. Additional details on speakers and session topics for the workshop are available on the 2015 Users Workshop page.

Registration for the Users Workshop is open through May 20, 2015. See the Registration page for details. 

Presenter(s):
Multiple
Type of event:
Workshop
Building:
CG1
Room:
CG1-1212-Center-Auditorium
Will this event be webcast by NCAR/UCAR?
No

Posted by Doug Dirks (ddirks@ucar.edu) at x8657
Lab/division hosting the event:
UCAR Community Programs, Unidata
Affiliation or organization:
Monday, June 22, 2015 - 8:00am, Tuesday, June 23, 2015 - 8:00am, Wednesday, June 24, 2015 - 8:00am, Thursday, June 25, 2015 - 8:00am

The Unidata Users Committee invites you to join Unidata staff, community members, and distinguished speakers this June for a workshop is to raise awareness of important new trends in geoscience technology, including cloud computing, data management, and the place of the Python language in geoscience computing infrastructure. The workshop is a chance for the academic community to share hands-on activities, course materials, and ideas for improving research and education.

The workshop, titled Data-Driven Geoscience: Applications, Opportunities, Trends, and Challenges, will be held June 22-25, 2015 at CG 1.

The workshop will feature oral presentations, hands-on demonstrations of Unidata and related technologies, collaborative work sessions, and a poster session for those who wish to share their work with workshop participants. Additional details on speakers and session topics for the workshop are available on the 2015 Users Workshop page.

Registration for the Users Workshop is open through May 20, 2015. See the Registration page for details. 

Presenter(s):
Multiple
Type of event:
Workshop
Building:
CG1
Room:
CG1-1212-Center-Auditorium
Will this event be webcast by NCAR/UCAR?
No

Posted by Doug Dirks (ddirks@ucar.edu) at x8657
Lab/division hosting the event:
UCAR Community Programs, Unidata
Affiliation or organization:
Monday, June 22, 2015 - 8:00am, Tuesday, June 23, 2015 - 8:00am, Wednesday, June 24, 2015 - 8:00am, Thursday, June 25, 2015 - 8:00am

The Unidata Users Committee invites you to join Unidata staff, community members, and distinguished speakers this June for a workshop is to raise awareness of important new trends in geoscience technology, including cloud computing, data management, and the place of the Python language in geoscience computing infrastructure. The workshop is a chance for the academic community to share hands-on activities, course materials, and ideas for improving research and education.

The workshop, titled Data-Driven Geoscience: Applications, Opportunities, Trends, and Challenges, will be held June 22-25, 2015 at CG 1.

The workshop will feature oral presentations, hands-on demonstrations of Unidata and related technologies, collaborative work sessions, and a poster session for those who wish to share their work with workshop participants. Additional details on speakers and session topics for the workshop are available on the 2015 Users Workshop page.

Registration for the Users Workshop is open through May 20, 2015. See the Registration page for details. 

Presenter(s):
Multiple
Type of event:
Workshop
Building:
CG1
Room:
CG1-1212-Center-Auditorium
Will this event be webcast by NCAR/UCAR?
No

Posted by Doug Dirks (ddirks@ucar.edu) at x8657
Lab/division hosting the event:
UCAR Community Programs, Unidata
Affiliation or organization:
Monday, June 22, 2015 - 8:00am, Tuesday, June 23, 2015 - 8:00am, Wednesday, June 24, 2015 - 8:00am, Thursday, June 25, 2015 - 8:00am

The Unidata Users Committee invites you to join Unidata staff, community members, and distinguished speakers this June for a workshop is to raise awareness of important new trends in geoscience technology, including cloud computing, data management, and the place of the Python language in geoscience computing infrastructure. The workshop is a chance for the academic community to share hands-on activities, course materials, and ideas for improving research and education.

The workshop, titled Data-Driven Geoscience: Applications, Opportunities, Trends, and Challenges, will be held June 22-25, 2015 at CG 1.

The workshop will feature oral presentations, hands-on demonstrations of Unidata and related technologies, collaborative work sessions, and a poster session for those who wish to share their work with workshop participants. Additional details on speakers and session topics for the workshop are available on the 2015 Users Workshop page.

Registration for the Users Workshop is open through May 20, 2015. See the Registration page for details. 

Presenter(s):
Multiple
Type of event:
Workshop
Building:
CG1
Room:
CG1-1212-Center-Auditorium
Will this event be webcast by NCAR/UCAR?
No

Posted by Doug Dirks (ddirks@ucar.edu) at x8657
Lab/division hosting the event:
UCAR Community Programs, Unidata
Affiliation or organization: