Staff Notes Daily Announcements

The influence of the Rocky Mountains on the
ocean's Meridional Overturning Circulation
Elizabeth Maroon, CIRES

The general circulation of the ocean features a strong Meridional Overturning Circulation (MOC) in the North Atlantic that has no equivalent in the North Pacific. Several hypotheses have been suggested for this asymmetry, including differences in ocean basin width, the southern extent of Africa, and the poleward extent of the Atlantic. In this study, we test Warren’s (1983) hypothesis that a vigorous MOC exists in the North Atlantic and not the North Pacific because the gyre circulation in the North Atlantic is more efficient in transporting salty water northward poleward than is the gyre circulation in the North Pacific; these gyre circulation differences were hypothesized to stem from wind stress differences that are due to a stationary wave, generated by the Rocky Mountain Cordillera. We first perform a control integration of a modified version of the coarse resolution coupled climate model from GFDL (CM2Mc see Galbraith et al., 2011), which features reasonably realistic circulation in the North Pacific and Atlantic. Branching off the control simulation, we then flatten the Rocky Mountains. Within a few decades of flattening, deep convection and a MOC appear in the North Pacific, and the Atlantic MOC is reduced. After a few centuries, the new equilibrium has a 25 Sv MOC in the Pacific, deep convection in the northwest Pacific, and a reduced Atlantic MOC. We then perform a second simulation to examine whether these ocean circulation changes are due to changes in the wind stress or due to changes in river runoff from flattening the Rockies. In this simulation, we retain the Rockies orography but artificially re-route North American runoff that would have flowed to the Pacific to instead flow to the Atlantic. The resulting MOC changes are very similar to those in the flattened Rockies experiment. The results from these simulations suggest that the impact of the Rockies on the global ocean MOC is primarily through their impact on hydrology rather than on surface winds.

Tuesday, 4 April 2017
11:00 AM, refreshments at 10:45
Mesa Lab, Main Seminar Room

Live webcast: http://www.fin.ucar.edu/it/mms/ml-live.htm
For more information, contact Gaylynn Potemkin, email potemkin@ucar.edu, phone: 303.497.1618

Posted by Gaylynn Potemkin at ext. 1618, potemkin@ucar.edu

Wednesday, March 29, 2017 to Wednesday, April 5, 2017

Marine Ice Nucleating Particles: Implications for High Latitude Aerosol-Cloud Interactions

Christina S. McCluskey
Department of Atmospheric Science
Colorado State University

Large energy biases and uncertainties in future climate projections have been attributed to poor representation of cloud phase (ice or liquid) properties in global climate models (GCMs). Specifically, over high latitudes, such as the Southern Ocean, GCMs tend to predict too few clouds that do not reproduce the high supercooled liquid contents observed via satellite. Several processes govern cloud phase distributions, including the presence of atmospheric ice nucleating particles (INPs), or particles that initiate heterogeneous ice nucleation (IN). Sea spray aerosol (SSA), generated from wave breaking and bubble bursting at the ocean surface, is considered a unique INP source. Typical IN activity of SSA is lower than terrestrial aerosol, but laboratory and limited field measurements indicate that marine INP emissions may vary over orders of magnitude due to increased organic aerosol arising from oceanic biological productivity (i.e., phytoplankton blooms). Quantifying the role of SSA in natural INP populations, both regionally and globally, is a key gap in the scientific understanding of aerosol-cloud interactions in remote regions, where other INP sources (e.g., mineral dust) are absent.

In this presentation, I will discuss a series of studies aimed towards investigating the abundance and characteristics of marine INPs at varied latitudes, ranging from 65°S to 60°N, over the PacificOcean and at the Mace Head Observatory (MHO, Ireland). Aerosol and IN measurements from six ship campaigns are used to explore latitudinal variability in natural marine INP number concentrations. Strong variability in INP number concentrations and INP composition are observed and linked to clean marine versus terrestrial influences at the MHO. Investigations on the role of organic-rich plumes originating from biologically active oceans on marine INP emissions at the MHO and in the Southern Ocean will also be discussed. These findings advance the scientific understanding of the link between biological activity and marine INPs in the natural environment and illuminate marine INPs as a potentially important feature in remote ocean aerosol-cloud interactions

For those unable to attend, the seminar will be webcast live at:  http://www.fin.ucar.edu/it/mms/fl-live.htm

Tuesday April 4, 2017 3:30pm
FL2-1022 Large Auditorium
3450 Mitchell Lane Boulder, CO 

Posted by Meghan Stell at ext. 2043, meghan@ucar.edu

Wednesday, March 29, 2017 to Tuesday, April 4, 2017

TIAA Individual Counseling Session at RAF is scheduled:

RAF – Conference Room
Tuesday April 4, 2017 from 9:00am - 4:00pm

SIGN UP TODAY:  

To schedule a counseling session: Click here to schedule an appointment with TIAA or call their Scheduling and Service Group phone reservation center at: 1-800-732-8353. 

 

These sessions are in high demand, so if you have to miss your appointment, be sure to contact TIAA as soon as possible so they can fill your time slot.

Posted by Alyssa Fronk at ext. 8710, afronk@ucar.edu

Wednesday, March 29, 2017 to Tuesday, April 4, 2017

Concur Travel and Expense is now live so check out today's and tomorrow’s Concur Live Training opportunities!   Sign up by registering through Connect or drop into the class and register in person!

Here is today's schedule:

Requesting & Booking Travel:  Today in the ML-Main Seminar 1:30-2:30 p.m.

Expensing Travel & Requesting Reimbursement:  Today at ML-Main Seminar 3:00-3:30 p.m.

And tomorrow live training sessions include:

Going Mobile with Concur:  Wednesday, March 29 in FL2-1022 12:00-12:30 p.m.

Non-Employee Travel in Concur:   Wednesday, March 29 in  FL2-1002 1:00-2:00 p.m.

For a full list of the training and upcoming webinars, step-by-step guides, quick guides, and FAQs check out the Concur User Support Site!

Questions?  Contact your local Concur Coach for guidance, help and advice!

Posted by Helen Moshak at ext. 1112, moshak@ucar.edu

Tuesday, March 28, 2017 to Wednesday, March 29, 2017

UCAR's Event Services is self-funded, in-house service to our employees and visitors, and is committed to offering a high quality, diverse and reasonably priced cafeteria menu at each of our three Boulder campuses. We make every effort to procure goods and services from our suppliers in the most cost effective manner possible, while keeping our menu prices affordable. After conducting an analysis of the food costs based on industry standards, it is now necessary to implement a price increase due to the steadily rising food and supply costs. We last raised cafeteria menu prices in 2012 and as a result the increase in April is higher than we would like. Our on-going commitment to you (our customers) is to monitor food costs regularly with the intention to publish any increase in prices in a timely manner.


Effective April 3, there will be a price increase of between 16% and 18% on most menu items.


Event Services will continue to offer a variety of food and beverage choices, as well as provide a pleasant experience to our valued customers. Thank you for your continued patronage and support. If you have any suggestions, questions or comments, please contact Mike Albright at x1147.

Posted by Mike Albright at ext. 1147, michaela@ucar.edu

Tuesday, March 28, 2017 to Friday, March 31, 2017

Lower Back Pain Lunch & Learn Session

On April 6, join Dr. Lisa Brone, a Paladina Health physician, for a lunch and learn session to discuss lower back pain. 

Did you know? Lower Back Pain is a leading reason why individuals visit their physician. During this session, Dr. Brone will cover:

  • Understanding the difference between acute and chronic lower back pain
  • Learning the latest evidence for best treatments for lower back pain
  • Knowing when you might need an MRI vs. other therapy

Bring your own lunch and invite your colleagues. All employees are welcome to attend! This is great information for everyone. 

The session will be held on April 6 at CG1, Room 2126 from noon – 1:00 pm. The session will be webcast.

 

Posted by Alyssa Fronk at ext. 8710, afronk@ucar.edu

Tuesday, March 28, 2017 to Friday, March 31, 2017

WHO:  All staff who travel internationally

WHAT:  Don’t travel with data that is not needed for your trip. Don’t take export controlled or other sensitive or controlled data on international travel if it is not required and authorized.

WHY:  U.S. customs officials are authorized to search or retain electronic devices, including digital cameras, cell phones, media players, disk drives, flash drives, tablet devices, and laptops, even without probable cause, to look for violation of export control regulations as well as other laws and regulations. To prepare for this possibility:

  • Don’t carry data you don’t want others to see: medical records, research data files that cannot be published, financial information, photos, etc.
  • Before you travel, back up any data that you don’t want to lose.
  • Consider taking a minimal device (clean laptop) equipped with only ordinary, recognizable software and minimal data so any search can be fast.

CONTACT:  For further guidance view or download “International Travel with Devices and Data”, contact export@ucar.edu, or your ECC (Export Compliance Coordinator).

Posted by Rebecca Swisher at ext. 8609, rebeccas@ucar.edu

Monday, March 27, 2017 to Friday, March 31, 2017

Posted by Annette Lampert at ext. 8719, annette@ucar.edu

Monday, March 27, 2017 to Friday, April 7, 2017

As part of the upcoming Rising Voices conference, and UCAR's NSF INCLUDES project, we are happy to announce a 1-day professional development opportunity on April 12th, here at NCAR, for any scientists interested in working with Native American populations. The day-long course will provide information about the cultural practices and customs of a range of Indigenous Tribes, explain the political workings of the Tribal Governments, and provide guidelines for how to interact appropriately and respectfully with Native American communities and students. 

The workshop is free to NCAR/UCAR staff, and lunch will be provided. Attendance from NCAR/UCAR is limited to 10 places.

If you are interested in registering for the workshop, please contact Kris Marwitz at kmarwitz@ucar.edu. For more information about the workshop, please contact Carolyn Brinkworth at carolyln@ucar.edu

Posted by Carolyn Brinkworth at ext. 1670, carolyn@ucar.edu

Monday, March 27, 2017 to Wednesday, April 12, 2017

The Mesa Lab semi-annual building maintenance shutdown is scheduled for Saturday, 15 April from 6:00 a.m. until 6:00 p.m.  During this time the Mesa Lab and Fleischmann Buildings will experience intermittent electrical, heating, and air conditioning interruptions, some for extended periods.

Access to the Mesa Lab will be restricted to authorized employees, and there will be no public access to the building.  Visitors may still use the trails around the building.

CISL/ISGB will be releasing information regarding the impact of the Mesa Lab Data Center portion of the shutdown in the near future as details become available. Please direct questions about the Mesa Lab Data Center to isgb@ucar.edu.

Posted by David Maddy at ext. 1134, maddy@ucar.edu

Monday, March 27, 2017 to Thursday, March 30, 2017

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