Rackow, Thomas; Wesche, Christine; Timmermann, Ralph; Hellmer, Hartmut H; Juricke, Stephan; Jung, Thomas (2017): Melt climatology estimates for small to giant Antarctic icebergs, links to NetCDF files. PANGAEA, https://doi.org/10.1594/PANGAEA.865335, Supplement to: Rackow, T et al. (2017): A simulation of small to giant Antarctic iceberg evolution: Differential impact on climatology estimates. Journal of Geophysical Research: Oceans, 21 pp, https://doi.org/10.1002/2016JC012513
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We present four melt climatology estimates based on a simulation of Antarctic iceberg drift and melting that includes small, medium-sized, and giant tabular icebergs with a realistic size distribution. For the first time, an iceberg model is initialized with a set of nearly 7000 observed iceberg positions and sizes around Antarctica. We simulate drift and lateral melt using iceberg-draft averaged ocean currents, temperature, and salinity. A new basal melting scheme, originally applied in ice shelf melting studies, uses in situ temperature, salinity, and relative velocities at an iceberg's bottom.
The climatology estimates based on simulations of small (SMA), 'small-to-medium'-sized (MED12 & MED123), and small-to-giant icebergs (ALL) exhibit differential characteristics: successive inclusion of larger icebergs leads to a reduced seasonality of the iceberg meltwater flux and a shift of the mass input to the area north of 58°S, while less meltwater is released into the coastal areas. This highlights the necessity to account for larger and giant icebergs in order to obtain accurate melt climatologies.
The four monthly melt climatologies [mm/day] are available as netCDF files with 1°x1° spatial resolution and can be used, e.g., for sensitivity studies with uncoupled sea ice-ocean models, or as spatio-temporal templates for the redistribution of land ice from the Antarctic ice sheet over the Southern Ocean in climate models.
Latitude: -90.000000 * Longitude: 0.000000
To enable communication with users of the melt climatologies, the authors would appreciate a notification when using the data sets or when errors are found.
Coverage and size of the four NetCDF datasets are as follows: the datasets cover the Southern Ocean area between 36°S and 80°S. They each comprise 360 x 45 = 16200 spatial data points per month (194400 in total).
20 data points