ARM West Antarctic Radiation Experiment (AWARE) Field Campaign Report

Program Document · Fri Sep 15 04:00:00 EDT 2017

OSTI ID:1389616

Lubin, Daniel ^[1]; Bromwich, David H ^[2]; Vogelmann, Andrew M ^[3]; Verlinde, Johannes ^[4]; Russell, Lynn M ^[1]

---

1. Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography
2. Ohio State University
3. Brookhaven National Lab. (BNL), Upton, NY (United States)
4. Pennsylvania State Univ., University Park, PA (United States)

The U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) West Antarctic Radiation Experiment (AWARE) is the most technologically advanced atmospheric and climate science campaign yet fielded in Antarctica. AWARE was motivated be recent concern about the impact of cryospheric mass loss on global sea level rise. Specifically, the West Antarctic Ice Sheet (WAIS) is now the second largest contributor to rising sea level, after the Greenland Ice Sheet. As steadily warming ocean water erodes the grounding lines of WAIS components where they meet the Amundsen and Bellingshausen Seas, the retreating grounding lines moving inland and downslope on the underlying terrain imply mechanical instability of the entire WAIS. There is evidence that this point of instability may have already been reached, perhaps signifying more rapid loss of WAIS ice mass. At the same time, the mechanical support provided by adjacent ice shelves, and also the fundamental stability of exposed ice cliffs at the ice sheet grounding lines, will be adversely impacted by a warming atmosphere that causes more frequent episodes of surface melting. The surface meltwater damages the ice shelves and ice cliffs through hydrofracturing. With the increasing concern regarding these rapid cryospheric changes, AWARE was motivated by the need to (a) diagnose the surface energy balance in West Antarctica as related to both summer season climatology and potential surface melting, and (b) improve global climate model (GCM) performance over Antarctica, such that future cryospheric projections can be more reliable.

• Research Organization: DOE Office of Science Atmospheric Radiation Measurement (ARM) Program (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
• Contributing Organization: Scripps Institution of Oceanography, Ohio State University, Pennsylvania State University
• OSTI ID: 1389616
• Report Number(s): DOE/SC-ARM-17-028
• Country of Publication: United States
• Language: English

Related Subjects

ARM Mobile Facility
ARM West Antarctic Radiation
aerosol observing system
atmospheric emitted radiance interferometer
climatology
cloud radars
global climate models Experiment (AWARE)
high-spectral-resolution lidar
ice shelf loss
micropulse lidar