论文标题
1958 - 2021年期间的全球总沉淀水变化和趋势
Global total precipitable water variations and trends during 1958-2021
论文作者
论文摘要
水文循环对气候变化的全球反应已得到广泛研究，但仍然对低温层水蒸气的温度反应不确定性仍然存在。在这里，我们使用改进的ERE5和JRA-55重新分析数据集研究了从1958年到2021年的全球总降水性水（TPW）和表面温度的趋势，并通过使用RadioSonde，大气红外声音（AIRS）和Microwave卫星（SSMI（SSMI）（SSMI（SSMI（SSMI））观察，并进一步验证了这些趋势。我们的结果表明，根据ERA5数据，每十年的总沉淀水（TPW）的全球增加为0.66％，JRA-55数据的每十年增加了0.88％。这些TPW的变化反映了不同空间尺度上全球变暖反馈机制的相互作用。我们的结果还显示，以0.14 K DEC-1的速率和温度的强烈水蒸气响应在全球4-6％K -1的速度下，近距离温度（T2M）的变暖趋势有明显的趋势，而土地面积的变暖大约是海洋的两倍。 TPW和T2M或表面皮肤温度TS之间的关系显示在15-60纬度带中的6-8％K -1差异差异，与Clausius Clapeyron方程的理论估计相符。
Global responses of the hydrological cycle to climate change have been widely studied but uncertainties of temperature responses to lower-tropospheric water vapor still remain. Here, we investigate the trends in global total precipitable water (TPW) and surface temperature from 1958 to 2021 using improved ERA5 and JRA-55 reanalysis datasets and further validate these trends by using radiosonde, Atmospheric Infrared Sounder (AIRS), and Microwave Satellite (SSMI(S)) observations. Our results indicate a global increase in total precipitable water (TPW) of 0.66% per decade according to ERA5 data and 0.88 % per decade in JRA-55 data.These variations in TPW reflect the interactions of global warming feedback mechanisms across different spatial scales. Our results also revealed a significant near-surface temperature (T2m) warming trend at the rate of 0.14 K dec-1 and a strong water vapor response to temperature at a rate of 4-6 % K -1 globally, with land areas warming approximately twice as fast as the oceans. The relationship between TPW and T2m or surface skin temperature Ts showed a variation around 6 - 8 % K -1 in the 15-60 latitude band, aligning with theoretical estimates from the Clausius Clapeyron equation.
