农学学报2023，Vol.13Issue(12)：60-67,8.
2022年夏季陕西关中持续高温干旱天气成因及对农作物的影响
Analysis of Persistent High Temperature and Drought in Summer of 2022 and Its Impacts on Crops in Guanzhong of Shaanxi Province
摘要
Abstract
Persistent high temperature and drought occurred in Guanzhong of Shaanxi Province in summer of 2022,causing serious impacts on the growth and development of crops such as maize,apple and kiwifruit.To study the mechanisms of the occurrence of heat and drought,observations from 46 automatic meteorological stations in Guanzhong area,and ERA-5 hourly and monthly mean reanalysis data were used to study the characteristics and causes of atmospheric circulation during the main high temperature periods.The results showed that(1)the main high temperature periods were mid-late June and early-mid August,with moderate to severe drought in most parts of Guanzhong.(2)Both high-temperature periods were characterised by strong sinking currents,but the causes were different.In June,strong sinking movements were maintained by anomalous pre-ridge negative vorticity advective,while in August,the superposition of the subtropical high and South Asian high caused the positive climate state anomalies and strong sinking movements over Shaanxi.(3)The strong northwesterly airflow in June and the abnormally westerly and strong subtropical high in August weakened the southerly airflow and blocked the source of water vapour,both showing positive anomalies of water vapour flux dispersion,which were not conducive to the occurrence of precipitation.(4)High temperatures and drought had an impact on the yield and quality of food and cash crops.It was recommended that effective measures should be taken before high temperatures to lower field temperatures,replenish plant water,enhance plant transpiration and reduce the degree of crop heat stress.关键词
高温/干旱/农作物/关中地区Key words
high temperature/drought/crops/Guanzhong分类
天文与地球科学引用本文复制引用
乔丹杨,高萌,卢晔,王瑾婷,王瑾,刘帆..2022年夏季陕西关中持续高温干旱天气成因及对农作物的影响[J].农学学报,2023,13(12):60-67,8.基金项目
陕西省自然科学基础研究计划青年课题"关中平原城市群致灾性强对流天气网格客观预报方法研究"(2023-JC-QN-0311) （2023-JC-QN-0311）
陕西省气象局秦岭和黄土高原生态环境气象重点实验室青年基金课题"基于相似预报的高时空分辨率强对流预报研究"(2020Y-7). （2020Y-7）
