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AGU期刊一周Research Spotlight
AGU发布最新Editor's Highlight和国外学习工作机会(Jun 07~Jun 13, 2019)
时间:2019年06月14日 10:32来源:www.3522com 点击数:

Creating Icebergs in Ocean Models Coupled to Ice Shelves

Modeling icebergs as Lagrangian elements held together by numerical bonds provides insights into coupled exchanges of heat, freshwater, and momentum between large icebergs and the ocean.

SOURCE: Journal of Geophysical Research: Oceans

Changes in ocean surface temperature as a large iceberg and several small icebergs break off an ice shelf. Snapshots are taken 7, 15 and 50 days after calving. Color shows temperature change, in degrees Celsius, relative to conditions before the icebergs calved. Gray shades show ice thickness, in meters. Credit: Stern et al. [2019], Figure 2

By Laurence Padman 6 June 2019

Large tabular icebergs that break off ice shelves in Antarctica drift north into the Southern Ocean. Standard ocean models assume that, regardless of its size, an iceberg can be treated as a "passive tracer" that follows the ocean currents that would be predicted in a model which ignored the iceberg. However, a large iceberg modifies the ocean around itself in ways that affect its path and the rate at which it melts.

Stern et al. [2019] describe a new model for the ocean, ice shelves, and icebergs that includes the feedbacks between the ocean and the ice as an iceberg breaks away from an ice shelf and begins to drift into the open ocean. Their model shows how the three-dimensional currents that are generated around the iceberg affect melting rates, iceberg drift and rotation, and the transport of water that is trapped under the iceberg.

This new approach to modeling icebergs should lead to better predictions of how ice that is lost from the Antarctic Ice Sheet is carried away from the Antarctic coast to influence the Southern Ocean's stratification, sea ice and ecosystems, and its role in global climate.

Citation: Stern, A. A., Adcroft, A., & Sergienko, O. V. [2019]. Modeling ice shelf cavities and tabular icebergs using lagrangian elements. Journal of Geophysical Research: Oceans, 124. https://doi.org/10.1029/2018JC014876

—Laurence Padman, Editor, JGR: Oceans

AGU发布最新国外工作学习机会:

1. Professor and Director of the University of Michigan Biological Station

Ann Arbor, Michigan

University of Michigan / LSA

https://findajob.agu.org/job/8010752/professor-and-director-of-the-university-of-michigan-biological-station/

2. Tenure-Track Faculty Position

Seoul (KR)

Department of Earth System Sciences, Yonsei University

https://findajob.agu.org/job/8010747/tenure-track-faculty-position/

3. Postdoctoral Position in Soil Structure and Climate Change

Riverside, California

University of California, Riverside

https://findajob.agu.org/job/8010746/postdoctoral-position-in-soil-structure-and-climate-change/

4. Geoscience Communication and Outreach

Lexington, Kentucky (US)

University of Kentucky

https://findajob.agu.org/job/8010741/geoscience-communication-and-outreach/

5. Assistant/Associate/Full Professors-Geophysics, Structure Geology, Geodesy, Space Physics

Shenzhen, China

Southern University of Science and Technology (SUSTech)

https://findajob.agu.org/job/8009741/assistant-associate-full-professors-geophysics-structure-geology-geodesy-space-physics/?LinkSource=PremiumListing

6. PhD Scholarship in landslide-fault interactions at the University of Canterbury and GNS Science

University of Canterbury and GNS Science, New Zealand

University of Canterbury

https://findajob.agu.org/job/8009727/phd-scholarship-in-landslide-fault-interactions-at-the-university-of-canterbury-and-gns-science/

7. A funded PhD opportunity in near surface geophysics at Oklahoma State University

Oklahoma State University, Stillwater

Boone Pickens School of Geology-Oklahoma State University

https://findajob.agu.org/job/8009728/a-funded-phd-opportunity-in-near-surface-geophysics-at-oklahoma-state-university/

8. Postdoctoral Researcher in Aqueous Geochemistry/Hydrothermal Systems

Minneapolis, Minnesota

University of Minnesota, Department of Earth Sciences

https://findajob.agu.org/job/8009739/postdoctoral-researcher-in-aqueous-geochemistry-hydrothermal-systems/

9. Nutrient Biogeochemistry, Catchment Hydrology, and Limnology Postdoc

Burlington, Vermont

Vermont EPSCoR (University of Vermont)

https://findajob.agu.org/job/8009740/nutrient-biogeochemistry-catchment-hydrology-and-limnology-postdoc/

10. Professor of Geophysics

Cambridge, Cambridgeshire (GB)

Department of Earth Sciences, University of Cambridge

https://findajob.agu.org/job/8009737/professor-of-geophysics/?LinkSource=PremiumListing

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