1950年至1980年間的全球水文循環(huán)的衰弱歸因于大氣中氣溶膠的增加，《自然—氣候變化》上的一項(xiàng)研究報(bào)告如是說(shuō),。當(dāng)環(huán)境變暖時(shí),，降水和河水流量的增加是理所當(dāng)然,，但是這種變化仍未獲得觀測(cè),。高濃度的人源性大氣粒子要為這種矛盾承擔(dān)責(zé)任，直到上世紀(jì)80年代,，逐漸增加的溫室氣體才主導(dǎo)水文循環(huán)的恢復(fù)過(guò)程,。
Peili Wu等人分析了氣候模型模擬數(shù)據(jù)以找出氣候變化對(duì)水文循環(huán)的影響。他們發(fā)現(xiàn)觀測(cè)到的降水趨勢(shì)由兩種人為因素造成——大氣氣溶膠和溫室氣體濃度,。
最近幾年,，在大氣污染減少的情況下所增加的氣體排放增強(qiáng)了水文循環(huán)，這意味著如果目前這種趨勢(shì)持續(xù)下去,，未來(lái)降水將可能有所增加,。（生物谷 Bioon.com）
生物谷推薦的英文摘要
Nature Climate Change doi:10.1038/nclimate1932
Anthropogenic impact on Earth’s hydrological cycle
Peili Wu,1 Nikolaos Christidis1 & Peter Stott1
The global hydrological cycle is a key component of Earth’s climate system. A significant amount of the energy the Earth receives from the Sun is redistributed around the world by the hydrological cycle in the form of latent heat flux1. Changes in the hydrological cycle have a direct impact on droughts, floods, water resources and ecosystem services. Observed land precipitation2, 3, 4 and global river discharges5 do not show an increasing trend as might be expected in a warming world6, 7, 8, 9, 10, 11. Here we show that this apparent discrepancy can be resolved when the effects of tropospheric aerosols are considered. Analysing state-of-the-art climate model simulations, we find for the first time that there was a detectable weakening of the hydrological cycle between the 1950s and the 1980s, attributable to increased anthropogenic aerosols, after which the hydrological cycle recovered as a result of increasing greenhouse gas concentrations. The net result of these two counter-acting effects is an insignificant trend in the global hydrological cycle, but the individual influence of each is substantial. Reductions in air pollution have already shown an intensification in the past two decades12, 13, 14 and a further rapid increase in precipitation could be expected if the current trend continues.
