Interactions between tropospheric chemistry and climate model temperature and humidity biases
Interactions between tropospheric chemistry and climate model temperature and humidity biases
复制标题
对流层化学与气候模型温度和湿度偏差之间的相互作用
DOI：
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发表时间：
2009
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影响因子：
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通讯作者：
W. Collins
中科院分区：
文献类型：
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作者：
F. O’Connor;C. E. Johnson;O. Morgenstern;W. Collins
来自英国气象局哈德利中心气候模型HadGAM 1的温度和湿度气候显示，在热带外对流层上部/平流层下部存在高达5 K的强冷偏差，而在热带对流层下部和中部存在高达20%的干燥偏差。单独去除温度偏差对对流层臭氧或甲烷寿命的影响很小。仅去除湿度偏差就可使全球年平均对流层臭氧负担减少2%以上，甲烷寿命减少3.6- 4.2%。一起去除两个偏置的影响类似于单独去除湿度偏置的影响。选择再分析产品（ERA-40或NCEP）计算偏倚不会对结果产生很大影响。来自臭氧和甲烷的辐射反馈减少了一些气候模型的偏差，而对化学性能没有任何重大变化。
Temperature and humidity climatologies from the Met Office Hadley Centre climate model, HadGAM1, show a strong cold bias of up to 5 K in the extra‐tropical upper troposphere/lower stratosphere and a dry bias of up to 20% in the tropical lower and mid troposphere. Removing the temperature bias alone has little effect on tropospheric ozone or methane lifetime. Removing the humidity bias alone causes a reduction in both the global annual mean tropospheric ozone burden of greater than 2% and the methane lifetime of 3.6–4.2%. The impact of removing both biases together is similar to that of removing the humidity bias alone. The choice of reanalysis product (ERA‐40 or NCEP) to calculate the biases does not greatly affect the results. Radiative feedback from ozone and methane reduced some of the climate model biases without any significant change to the performance of the chemistry.