极地研究2016，Vol.28Issue(1)：58-66,9.DOI:10.13679/j.jdyj.2016.1.058
2013-2014年夏季南极普里兹湾反照率走航观测研究
SEA ICE ALBEDO OBSERVATIONS DURING NAVIGATIONS THROUGH PRYDZ BAY, ANTARCTICA, IN THE AUSTRAL SUMMER OF 2013-2014
摘要
Abstract
Underway incident and reflected solar irradiance were measured onboard the R /V Xuelong during its naviga-tions in Prydz Bay, Antarctica, in the Austral summer of 2013—2014.The albedo of seawater and sea ice was cal-culated using the observed data .Albedo obtained from different navigational segments from late November to early March was compared .This period spanned the seasons of sea ice melt to growth .Landfast ice covered by snow had the largest albedo (~0.70).The second highest was pack ice with snow (~0.55—0.65), while, the albedo of pack ice without snow cover could decrease to about 0.40.The albedo of new ice was very low (~0.15—0.30). However , snow cover would increase it to about 0 .40 , which was comparable with second-year ice without snow cover.The observed albedo was linked to sea ice concentration derived from AMSR 2 data and visual observations from the bridge of the R/V Xuelong .Regional average albedo depended mainly on sea ice concentration , although it was also affected by the physics of the underlying surface .For example , the albedo of new ice formed from late February to early March was only 30%—50%that of second-year pack ice .Therefore , the contribution of new ice to the regional average albedo is not as great as to regional ice concentration .During the melt season , the relatively large water content within the snow cover can reduce near-infrared spectral reflection .Thus, ice concentration alone is insufficient to establish a reasonable albedo parameterization for the mixing zone of sea ice and open water .In-stead, the influences of ice and snow types should also be considered .关键词
南极/普里兹湾/海冰/密集度/反照率/太阳短波辐射Key words
Antarctica/Prydz Bay/sea ice/concentration/albedo/solar irradiance引用本文复制引用
李明广,雷瑞波,李志军,韩红卫,田忠翔..2013-2014年夏季南极普里兹湾反照率走航观测研究[J].极地研究,2016,28(1):58-66,9.基金项目
国家自然科学基金面上项目(41476170),国家海洋局“南北极环境综合考察与评估”专项(CHINARE2015-01-01)和工信部高技术船舶科研计划项目(K24288)资助 （41476170）
