| 基于LMDZ模型的西北干旱区水汽再循环率分析 |
| |
| 引用本文： | 余秀秀,张明军,王圣杰,邱雪,杜铭霞,周苏娥,孟鸿飞.基于LMDZ模型的西北干旱区水汽再循环率分析[J].干旱区研究,2019,36(1):29-43. |
| |
| 作者姓名： | 余秀秀 张明军 王圣杰 邱雪 杜铭霞 周苏娥 孟鸿飞 |
| |
| 作者单位： | 西北师范大学地理与环境科学学院,甘肃兰州,730070;西北师范大学地理与环境科学学院,甘肃兰州730070;陕西省河流湿地生态与环境重点实验室,陕西渭南714099;中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 |
| |
| 基金项目： | 国家自然科学基金项目（41461003，41771035，41701028）；中国沙漠气象科学研究基金（Sqj2016001）；陕西省河流湿地生态与环境重点实验室开放基金项目（SXSD201703）资助 |
| |
| 摘 要： | 局地水汽再循环是陆地水循环过程的重要环节。在我国西北干旱区水汽再循环的绝对量虽然有限,但对区域降水的贡献(即水汽再循环率)却不容忽视。本文基于嵌套同位素模块的LMDZ模式模拟数据,运用同位素混合模型,对西北干旱区1979-2007年水汽再循环率的时空特征及其作用机制进行了分析。结果表明:研究时段内,外来水汽对降水的月尺度和年尺度贡献率都明显高于再循环水汽,季节上呈夏高冬低,年际上呈逐渐上升的态势;而再循环水汽的贡献率较低,呈夏季低冬季高且逐年下降(冬半年植物蒸腾水汽的贡献率在年际上呈上升趋势)的特点。外来水汽对降水的贡献率存在空间差异,山区附近的值往往较高,荒漠平原区的值则较低。就地表蒸发与植物蒸腾而言,地表蒸发对降水的贡献率整体低于植物蒸腾,但在小范围地区也有相反的规律。外来水汽和地表蒸发水汽的贡献量与其贡献率的空间分布特征基本一致,而植物蒸腾水汽在山区的贡献量高于荒漠平原区。
|
| 关 键 词： | 水汽再循环 降水贡献率 空间分布 同位素混合模型 LMDZ模型 西北干旱区 |
| 收稿时间： | 2018-07-16 |
Contribution of Moisture Recycling to Precipitation in
the Arid Region inNorthwest China Based on LMDZ Model |
| |
| YU Xiu-xiu,ZHANG Ming-jun,WANG Sheng-jie,QIU Xue,DU Ming-xia,ZHOU Sue,MENG Hong-fei.Contribution of Moisture Recycling to Precipitation in
the Arid Region inNorthwest China Based on LMDZ Model[J].Arid Zone Research,2019,36(1):29-43. |
| |
| Authors: | YU Xiu-xiu ZHANG Ming-jun WANG Sheng-jie QIU Xue DU Ming-xia ZHOU Sue MENG Hong-fei |
| |
| Institution: | (College of Geography and Environmental Science,Northwest Normal University,Lanzhou 130010,Gansu,China;Key Laboratory for Ecology and Environment of Riverine Wetlands in Shaanxi Province,Weinan 114099,Shaanxi,China;Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,Xinjiang,China) |
| |
| Abstract: | As an important link in the process of land water
cycle,the contribution of local moisture recycling to precipitation in the arid
region in northwest China cannot be ignored although its absolute amount is
relatively limited. Based on the isotopic data simulated by LMDZ
simulations,the spatiotemporal distribution characteristics and mechanism of
the contribution proportion of recycled moisture during the period from 1979 to
2007 in the arid region in northwest China were analyzed by the isotopic mixing
model.Results showed that the monthly and interannual contribution rate of
advection moisture to precipitation was obviously higher than that of recycled
moisture during the study period,it was high in summer but low in winter,and
increased gradually at annual scale.Oppositely,the monthly and interannual
contribution rate of recycled moisture to precipitation was relatively low,it
was low in summer but high in winter,and decreased year by year (the
interannual contribution proportion of plant transpiration moisture increased
in winter half year).Spatially,the contribution proportion of advection
moisture was different,and it was high in mountainous areas but low in desert
plains.The contribution proportion of evaporation vapor was lower than that of
plant transpiration vapor in most areas,but it was opposite in some regions.The
spatial distribution of the contribution amount of advection vapor and surface
evaporation vapor was consistent with its contribution rate,while the
contribution amount of plant transpiration vapor was higher in mountainous
areas than that in desert plains. |
| |
| Keywords: | moisture recycling precipitation contribution proportion spatial distribution isotopic mixing model LMDZ model arid region Northwest China |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《干旱区研究》浏览原始摘要信息 |
| 点击此处可从《干旱区研究》下载免费的PDF全文 |
|
