Cordero Raul R, Damiani Alessandro, Ferrer Jorge, Jorquera Jose, Tobar Mario, Labbe Fernando, Carrasco Jorge, Laroze David
Departamento de Física, Universidad de Santiago de Chile, Santiago, Chile.
Departamento de Física, Universidad de Santiago de Chile, Santiago, Chile; Escuela Superior Politécnica del Litoral, Guayaquil, Ecuador.
PLoS One. 2014 Mar 5;9(3):e90705. doi: 10.1371/journal.pone.0090705. eCollection 2014.
We report on the first spectral measurements of ultraviolet (UV) irradiance and the albedo at a Camp located in the southern Ellsworth Mountains on the broad expanse of Union Glacier (700 m altitude, 79° 46' S; 82° 52'W); about 1,000 km from the South Pole. The measurements were carried out by using a double monochromator-based spectroradiometer during a campaign (in December 2012) meant to weight up the effect of the local albedo on the UV irradiance. We found that the albedo measured at noon was about 0.95 in the UV and the visible part of the spectrum. This high surface reflectivity led to enhancements in the UV index under cloudless conditions of about 50% in comparison with snow free surfaces. Spectral measurements carried out elsewhere as well as estimates retrieved from the Ozone Monitoring Instrument (OMI) were used for further comparisons.
我们报告了在位于南埃尔斯沃思山脉广阔的联合冰川（海拔700米，南纬79°46′；西经82°52′）上的一个营地进行的首次紫外线（UV）辐照度和反照率的光谱测量；该营地距离南极约1000公里。这些测量是在一次考察活动（2012年12月）期间使用基于双单色仪的光谱辐射计进行的，目的是评估当地反照率对紫外线辐照度的影响。我们发现，在中午测量的紫外线和光谱可见光部分的反照率约为0.95。与无雪表面相比，这种高表面反射率导致在无云条件下紫外线指数增强约50%。在其他地方进行的光谱测量以及从臭氧监测仪器（OMI）获得的估计值用于进一步比较。
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