应用生态学报2017，Vol.28Issue(8)：2563-2568,6.DOI:10.13287/j.1001-9332.201708.015
陕北安塞县黄土丘陵区露水凝结时间与频率
Dew condensation time and frequency in the loess hilly region of Ansai County, northern Shaanxi Province, China
摘要
Abstract
Dew condensation time and frequency are basic parameters for exploring the vapor phase of water resources.According to an in-situ monitoring of near-surface dew occurrence between 2015 and 2016 in a typical loess hilly region of Ansai County,Shaanxi Province,the dew condensation time,frequency and their atmospheric influencing factors were analyzed.Results showed that the dew condensation time was long and occurred in cyclic patterns.Over the daily cycle,dew manifested a typical "night-time show and day-time no-show" pattern,and it mainly occurred between 21:00 and 8:00 while the most frequently condensed dew period was between 4:00 and 6:00.Over the seasonal cycle,summer and fall had the higher frequency,whereas spring and winter had the lower frequency.Over the annual cycle,the most frequent dew period was from June to November.Compared to rainfall,dewfall had characteristics of higher frequency and stronger stability.A variety of substrate and meteorological factors contributed to the formation of dew,e.g.dew occurred more frequently when the atmospheric relative humidity was greater than 80％,air temperature-dew point difference was between 1 and 3 ℃,and wind speed was between 0 and 1 m · s-1.In Ansai,wind directions ranging among 120°-150° and 240°-300° were more favorable to dew condensation.关键词
露水凝结时段/露水发生频率/黄土丘陵区/气象因素Key words
dew condensation time/dew occurrence frequency/loess hilly region/meteorological factors引用本文复制引用
王浩,贾志峰,卢玉东,何自立,汪有科,陈云明,王智..陕北安塞县黄土丘陵区露水凝结时间与频率[J].应用生态学报,2017,28(8):2563-2568,6.基金项目
本文由“111”引智计划项目(B08039)、中央高校基本科研业务专项(310829161003)和西北农林科技大学后稷学者专项项目(Z111021003)资助 This work was supported by the" 111" Intellectual Importation Project(B08039),the Fundamental Research Funds for the Central Universities (310829161003) and the Houji Scholar Special Funds from Northwest A&F University (Z111021003). （B08039）
