Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 4.713
IF4.713
IF 5-year value: 4.927
IF 5-year
4.927
CiteScore value: 8.0
CiteScore
8.0
SNIP value: 1.425
SNIP1.425
IPP value: 4.65
IPP4.65
SJR value: 2.353
SJR2.353
Scimago H <br class='widget-line-break'>index value: 71
Scimago H
index
71
h5-index value: 53
h5-index53
Preprints
https://doi.org/10.5194/tc-2020-297
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2020-297
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  20 Nov 2020

20 Nov 2020

Review status
This preprint is currently under review for the journal TC.

A Novel Approach to Map the Intensity of Surface Melting on the Antarctica Ice Sheet using SMAP L-Band Microwave Radiometry

Seyedmohammad Mousavi1, Andreas Colliander1, Julie Z. Miller2, and John S. Kimball3 Seyedmohammad Mousavi et al.
  • 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
  • 2Earth Science and Observation Center, University of Colorado, Boulder, CO 80309, USA
  • 3Numerical Terradynamic Simulation Group, University of Montana, Missoula, MT 59812, USA

Abstract. The polar ice sheets have undergone unprecedented melt events in the recent past, which have consequences for ice sheet mass balance, stability, and sea level. In this study, we employed L-band (1.4 GHz) brightness temperature observations collected by NASA's Soil Moisture Active Passive (SMAP) mission to investigate the extent, duration and intensity of melt events on the Antarctic Ice Sheet from 2015 to 2020. Satellite microwave measurements have long been used to detect melt events because of their sensitivity to the presence of liquid water in snow and ice. The observed microwave response depends on the sensor measurement frequency. Our hypothesis for this study is that the relatively long wavelength SMAP observations can detect a wider range of surface wetness conditions relative to shorter wavelength microwave observations that attain signal saturation at relatively lower wetness levels and within shallower surface layers. SMAP provides nearly all-weather surface monitoring over all of Antarctica twice daily with morning and evening overpasses at about 40 km spatial resolution. We applied an empirical threshold algorithm using horizontally and vertically polarized microwave brightness temperature differences to detect surface melt events over Antarctica from 2015 through 2020. The results show that the SMAP empirical algorithm can be used to detect melt extent and duration, and the geophysical model-based algorithm can be used to detect snow wetness, which can be used as an indicator of melt intensity. Analysis of the melt seasons between 2015 and 2020 show that the even though the melt extent in 2019–2020 was not as large as during the 2015–2016 melt season, it was significantly more intense, particularity on the West Antarctic Ice Sheet.

Seyedmohammad Mousavi et al.

Interactive discussion

Status: open (until 15 Jan 2021)
Status: open (until 15 Jan 2021)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Seyedmohammad Mousavi et al.

Seyedmohammad Mousavi et al.

Viewed

Total article views: 237 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
175 61 1 237 0 3
  • HTML: 175
  • PDF: 61
  • XML: 1
  • Total: 237
  • BibTeX: 0
  • EndNote: 3
Views and downloads (calculated since 20 Nov 2020)
Cumulative views and downloads (calculated since 20 Nov 2020)

Viewed (geographical distribution)

Total article views: 229 (including HTML, PDF, and XML) Thereof 223 with geography defined and 6 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 27 Nov 2020
Publications Copernicus
Download
Citation