Icebergs calved from the Antarctic continent act as moving sources of freshwater while drifting in the Southern Ocean. The lifespan of these icebergs strongly depends on their original size during calving. In order to investigate the effects (if any) of the calving size of icebergs on the Southern Ocean, we use a coupled general circulation model with an iceberg component. Iceberg calving length is varied from 62 m up to 2.3 km, which is the typical range used in climate models. Results show that increasing the size of calving icebergs leads to an increase in the westward iceberg freshwater transport around Antarctica. In simulations using larger icebergs, the reduced availability of meltwater in the Amundsen and Bellingshausen Seas suppresses the sea-ice growth in the region. In contrast, the increased iceberg freshwater transport leads to increased sea-ice growth around much of the East Antarctic coastline. These results suggest that the absence of large tabular icebergs with horizontal extent of tens of kilometers in climate models may introduces systematic biases in sea-ice formation, ocean temperatures, and salinities around Antarctica.
2020 | Journal of Climate, 33(17), 7275-7287, 2020
Description:
Monsoon low pressure systems (MLPSs) are among the most important synoptic-scale disturbances of the South Asian summer monsoon. Potential changes in ...
2016 | J. Geophys. Res. Earth Surf., 121, 497– 510
Description:
Satellite laser altimetry reveals short timescale changes in Antarctic ice sheet surface elevation that are suggested to be driven by subglacial water...
Extracting multiple-scale observational information is critical for accurately reconstructing the structure of mesoscale circulation systems such as t...
An 8 year volcanic SO2 emission inventory for 2005–2012 is obtained based on satellite measurements of SO2 from OMI (Ozone Monitoring Instrument) ...
Arid extratropical Asia (AEA) is bisected at the wetter Tian Shan (a northern offshoot of the Tibetan Plateau) into east and west deserts, each with u...
Uncertainty in equilibrium climate sensitivity impedes accurate climate projections. While the intermodel spread is known to arise primarily from diff...
High-latitude phytoplankton blooms support productive fisheries and play an important role in oceanic uptake of atmospheric carbon dioxide. In the sub...
We examine how soil moisture variability and trends affect the simulation of temperature and precipitation extremes in six global climate models using...
The response of the equatorial Pacific Ocean’s seasonal cycle to orbital forcing is explored using idealized simulations with a coupled atmosphereâ€...
Sea surface cooling along tropical cyclone (TC) tracks has been well observed, but a complete understanding of the full three-dimensional structure of...
2016 | Bulletin of the American Meteorological Society, 97(5), 817-820.
Description:
The Fourth Climate and Ocean: Variability, Predictability and Change (CLIVAR) workshop on the evaluation of El Niño–Southern Oscillation (ENSO) pro...
2020 | Journal of Advances in Modeling Earth Systems, 12, e2019MS002026.
Description:
The imprint of anthropogenic activities on the marine nitrogen (N) cycle remains challenging to represent in global models, in part because of uncerta...
The preferential dust source (PDS) scheme enables large-scale mapping of geomorphology in terms of importance for dust emissions but has not been inde...
Recently, there has been considerable interest in examining how sea-level extremes due to storm surge may be related to climate change. Evidence of ho...
2021 | Bulletin of the American Meteorological Society, 102(1), S1-S7.
Description:
July 2019 saw record-breaking wildfires burning 3,600 km2 in Alaska. The GFDL Earth system model indicates a threefold increased risk of Alaska’s ex...
Potential and real predictive skill of the frequency of extreme rainfall in southeastern South America for the December–February season are evaluate...
In August 2010, a 253 km2 ice island calved from the floating glacial tongue of Petermann Glacier in Northwest Greenland. Petermann Ice Island (PII)-B...
This study investigates the roles of radiative forcing, sea surface temperatures (SSTs), and atmospheric and land initial conditions in the summer war...
Despite 30 years of basin-wide nutrient-reduction efforts, severe hypoxia continues to be observed in the Chesapeake Bay. Here we demonstrate the cr...
2016 | Geophysical Research Letters, 43(24), 12,520-12,527
Description:
Icebergs account for approximately half the freshwater flux into the ocean from the Greenland and Antarctic ice sheets and play a major role in the di...
2022 | Journal of Advances in Modeling Earth Systems, 14(3), e2021MS002869
Description:
Large tabular icebergs account for the majority of ice mass calved from Antarctic ice shelves, but are omitted from climate models. Specifically, thes...
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