Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer
Atmospheric ozone above Troll station, Antarctica observed by a ground based microwave radiometer
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DOI：
10.5194/essd-6-105-2014
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发表时间：
2013-06
影响因子：
11.4
通讯作者：
M. Daae;C. Straub;C. Straub;P. Espy;D. Newnham
中科院分区：
文献类型：
--
作者：
M. Daae;C. Straub;C. Straub;P. Espy;D. Newnham
抽象的。本文介绍了位于南极Troll站（72° S，2.5° E，1270 m a.s.l.）的英国南极调查局地面微波辐射计（BAS辐射计）获得的中层一氧化碳（CO）数据。该数据集涵盖了2008年2月至2010年1月期间，然而，由于夏季低于约80公里海拔高度的CO浓度非常低，仅在南极冬季提供剖面。每天测量CO约2小时，约每半小时检索一次曲线。检索的配置文件，涵盖压力范围从1至0.01百帕（约48至80公里），比较从微波临边探测器的Aura卫星（Aura/MLS）和全大气社区气候模式与特定的动力学（SD-WACCM）的测量。这种相互比较表明，与两个参考数据集相比，BAS微波辐射计在0.1百帕（约64公里）和0.01百帕（约80公里）处的偏差分别为0.5至1 ppmv和2.5至3.5 ppmv。这种低偏差的一种解释可能是MLS的已知高偏差，其在相同的数量级上。地基辐射计在所有高度与两个参考数据集相比显示出高和显著的相关性（与MLS/SD-WACCM相比系数高于0.9/0.7）。该数据集可以在http://dx.doi.org/10/mhq下访问。
Abstract. This paper presents mesospheric carbon monoxide (CO) data acquired by the ground-based microwave radiometer of the British Antarctic Survey (BAS radiometer) stationed at Troll station in Antarctica (72° S, 2.5° E, 1270 m a.s.l.). The dataset covers the period from February 2008 to January 2010, however, due to very low CO concentrations below approximately 80 km altitude in summer, profiles are only presented during the Antarctic winter. CO is measured for approximately 2 h each day and profiles are retrieved approximately every half hour. The retrieved profiles, covering the pressure range from 1 to 0.01 hPa (approximately 48 to 80 km), are compared to measurements from Microwave Limb Sounder on the Aura satellite (Aura/MLS) and Whole Atmosphere Community Climate Model with Specified Dynamics (SD-WACCM). This intercomparison reveals a low bias of 0.5 to 1 ppmv at 0.1 hPa (approximately 64 km) and 2.5 to 3.5 ppmv at 0.01 hPa (approximately 80 km) of the BAS microwave radiometer compared to both reference datasets. One explanation for this low bias could be the known high bias of MLS which is on the same order of magnitude. The ground based radiometer shows high and significant correlation (coefficients higher than 0.9/0.7 compared to MLS/SD-WACCM) at all altitudes compared with both reference datasets. The dataset can be accessed under http://dx.doi.org/10/mhq .