期刊名称: |
Journal of Geophysical Research: Oceans |
全部作者: |
Zhantang Xu ,Shuibo Hu*,Guifen Wang,Jun Zhao,Yuezhong Yang,Wenxi Cao,Peng Lu |
出版年份: |
2016 |
卷 号: |
121 |
期 号: |
|
页 码: |
3450-3464 |
查看全本: |
|
Quantitative estimates of particulate matter [PM) concentration in sea ice using remote sensing
data is helpful for studies of sediment transport and atmospheric dust deposition flux. In this study, the difference
between the measured dirty and estimated clean albedo of sea ice was calculated and a relationship
between the albedo difference and PM concentration was found using field and laboratory
measurements. A semianalytical algorithm for estimating PM concentration in sea ice was established. The
algorithm was then applied to MODIS data over the Bohai Sea, China. Comparisons between MODIS derived
and in situ measured PM concentration showed good agreement, with a mean absolute percentage difference
of 31.2%. From 2005 to 2010, the MODIS-derived annual average PM concentration was approximately
0.025 g/L at the beginning of January. After a month of atmospheric dust deposition, it increased to
0.038 g/L. Atmospheric dust deposition flux was estimated to be 2.50 t/km2/month, similar to 2.20 t/km2/
month reported in a previous study. The result was compared with on-site measurements at a nearby
ground station. The ground station was close to industrial and residential areas, where larger dust depositions
occurred than in the sea, but although there were discrepancies between the absolute magnitudes of
the two data sets, they demonstrated similar trends.