The effects of continental evaporation for precipitation over East Asia
Abstract
In this study, we have investigated the impact of terrestrial moisture sources for the continental precipitation over East Asia, based on the method of Van der Ent et al. (2010). We utilize historical (1970-1999) and Representative Concentration Pathway (RCP) 8.5 scenario (2070-2099) data of HadGEM2-AO climate model. For the present-day period, about 46% of the global terrestrial precipitation is affected by the continental evaporation moisture. The effect of continental evaporation moisture for terrestrial precipitation over East Asia is about 66%, higher than the global average, because the moisture from midwestern of Eurasian continent is transported to East Asia by the prevailing westerlies. Regionally, the ratios of terrestrial precipitation origin continents over the Northern inland and Southern coast of East Asia are 82% and 48%, respectively. In particular, local moisture recycling ratios of mountainous areas (e.g., the Tibetan Plateau) are very high. Seasonally, the continental moisture recycling ratios are larger during summer (JJA) than winter (DJF). The effect of continental evaporation moisture for terrestrial precipitation over East Asia decrease by about 5% by the end of the 21st century in RCP 8.5 scenario. The future changes are interpreted as be associated with a decrease in European evaporation and an increase of moisture residence time.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2016
- Bibcode:
- 2016AGUFM.A51C0053K
- Keywords:
-
- 3305 Climate change and variability;
- ATMOSPHERIC PROCESSESDE: 3319 General circulation;
- ATMOSPHERIC PROCESSESDE: 3354 Precipitation;
- ATMOSPHERIC PROCESSESDE: 1620 Climate dynamics;
- GLOBAL CHANGE