学术
摘 要:
利用我国北极黄河站所在地，德国Koldewey站1993-2003年的资料，对新奥尔松地区的地表辐射特征进行了初步分析。结果表明，由于云的影响，新奥尔松极昼期间的日照百分率仅为32．2％。暖季由于下垫面地表冰雪融化，地表反射率迅速减小，地面吸收辐射和地面有效辐射都迅速增大。全年累计的净辐射为正值；暖季是接受太阳辐射能的主要时段，寒季接受的太阳辐射能极少。虽近10年来新奥尔松地区的气温增加十分显著，但各辐射量的变化趋势不明显。地表辐射实测值与同期NCEP／NCAR相邻格点逐日资料的比较表明，NCEP资料对各辐射项模拟的精度不高。[著者文摘]
文章出处:
《极地研究》-2006年18卷4期 -254-264页
栏目信息:
分 类 号:
SURFACE RADIATION CHARACTERISTICS AT NY-ALESUND OVER THE ARCTIC TUNDRA AREA
Deng Haibin, Lu Longhia and Bian Lingen, （Chinese Academy of Meteorological Sciences, Beijing 100081, China）
Abstract:
Based on Koldewey Station＇s 1993-2003 hourly observational data, this paper conducts a statistical analysis on the radiation characteristics for an arctic tundra region （ Ny-Alesund island） where our first arctic expedition station （Huanghe Station） is located. Affected by cloudy sky, Ny-Alesund＇s sunshine percent was only 32.2% even during deep summer. As a result of ice and snow＇s melting effect during warm season, surface reflecting ratio was quickly decreasing and surface absorbing radiation and effective radiation were rapidly increasing. The total net radiation was positive during the whole year. Surface absorbing radiation mainly focused in warm season and was absent during cold season. Radiation factors didn＇t show clear changing trends though temperature was clear uptrend at Ny-Alesund. NCEP/NCAR reanalysis data of the grid closest to Ny-Alesund aren＇t accurate in keeping consistent changes with the data obtained at Ny-Alesund about surface radiation factors.[著者文摘]
Key words:
Arctic, tundra surface, Koldewey, radiation characteristics, NCEP/NCAR
基金资助:
国家自然科学基金重点项目“北极苔原和海冰地区边界层物理过程的观测研究”（40333032）资助.致谢 感谢德国Alfred-Wegener-Institute（AWI）的Dr.AndreasHerber.Dr.Roland Neuber以及Mrs.SiegridDebatin提供Koldewey站的观测资料.
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