北极地区地面辐射量和云辐射强迫特征(英文)

In this paper the characteristics of surface radiative fluxes and cloud radiative forcing are reviewed with a focus on the Arctic. Three aspects are addressed, including (i) changes in radiation flux over the global surface; (ii) characteristics of surface fluxes in the Arctic; and (iii) characteristics of cloud radiative forcing in the Arctic. The clouds not only significantly reduce the peak summer radiative heating of the surface but also reduce the wintertime radiative cooling at the surface inhigher latitudes. The downward longwave fluxes dominates the incident radiative fluxes in the Arctic during most of the year. Incoming shortwave fluxes are negligible during late fall, winter and early spring, and even during the midsummer the incoming shortwave fluxes are only slightly greater than the downward longwave fluxes. The total net surface radiative flux is negative for most of the year and only positive during midsummer in the Arctic. The global net cloud radiative forcing is negative, but the cloud radiative forcing is positive in the Arctic, showing a warming effect, except for a short period in mid-summer. Positive cloud-radiative forcing in the Arctic is attributedto the presence of snow and ice with high albedo and the absence of solar radiation during the polar night.

阳江市2016年辐射变化特征分析

利用阳江市东平核电铁塔站2016年辐射观测资料,分析总辐射量、反辐射量、净辐射量、大气长波辐射量、地面长波辐射量的变化特征。针对每个辐射变量,分析其月平均值、平均最大值、极大值(净辐射量还增加月平均最小值、极小值两项)的变化特征;统计每个辐射变量每天24个正点在季和全年平均值,由每个正点平均值构成四季和全年全日变化曲线,分析每个辐射变量日变化特征。