| 典型岩溶区潜在蒸散发变化及其影响因素 |
| |
| 引用本文： | 郭小娇,龚晓萍,石建省,郭娇,袁道先,林玉石.典型岩溶区潜在蒸散发变化及其影响因素[J].地质学报,2019,93(12):3269-3281. |
| |
| 作者姓名： | 郭小娇 龚晓萍 石建省 郭娇 袁道先 林玉石 |
| |
| 作者单位： | 中国地质科学院水文地质环境地质研究所,石家庄,050061;广东省惠州市惠阳区自然资源局,广东惠阳,516200;中国地质科学院岩溶地质研究所/国土资源部,广西岩溶动力学实验室,广西桂林,541004 |
| |
| 基金项目： | 本文为中国地质科学院基本科研业务费项目（SK201703，SK201903）资助的成果。 |
| |
| 摘 要： | 蒸散发过程是联系大气过程和陆面水文过程的关键环节，对区域/流域水循环过程和水量平衡具有重要影响。岩溶区，地表生态环境脆弱，对气候变化响应敏感，蒸散发可能是联系大气、水、热交换和碳循环的关键生态水文过程。准确地估算蒸散发对于深入研究岩溶水循环响应气候变化、碳循环、生态修复等具有重要作用。本文选择典型岩溶区桂林市为研究对象，基于1951~2015年桂林市气象站逐日气象数据，采用Penman- Monterith方法计算了潜在蒸散发量，利用Mann- Kendall非参数检验法和相关性分析研究桂林市潜在蒸散发的变化趋势及其影响因素。研究结果表明，桂林市潜在蒸散发具有明显的年、年际和季节尺度变化特征。1951~2015年桂林市潜在蒸散发呈显著的减小趋势，变化速率为-8. 02 mm/10a；夏季、秋季和冬季潜在蒸散发呈下降趋势，而春季呈微弱的上升趋势；夏季潜在蒸散发的显著减小是影响年蒸散发下降的主要原因；桂林市潜在蒸散发在1967和2003年左右发生突变；通过Mann- Kendall趋势检验和相关性分析得出，桂林市平均气温、最高、最低气温呈显著的上升趋势，而风速、相对湿度、日照时数呈显著的下降趋势；日照时数是影响桂林市潜在蒸散发变化的主要因素，其次是风速。
|
| 关 键 词： | 潜在蒸散发 Penman-Monteith 变化趋势 日照时数 气候变化 |
| 收稿时间： | 2019/6/1 0:00:00 |
| 修稿时间： | 2019/7/23 0:00:00 |
The temporal variations of potential evapotranspiration and influence factors for a typical karst area |
| |
| GUO Xiaojiao,GONG Xiaoping,SHI Jiansheng,GUO Jiao,YUAN Daoxian and LIN Yushi.The temporal variations of potential evapotranspiration and influence factors for a typical karst area[J].Acta Geologica Sinica,2019,93(12):3269-3281. |
| |
| Authors: | GUO Xiaojiao GONG Xiaoping SHI Jiansheng GUO Jiao YUAN Daoxian and LIN Yushi |
| |
| Institution: | 1) Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang, 050061,3) Huiyang District Natural Resources Bureau in Huizhou Lity, Guangdong Province, Huiyang, Guangzhou,516200,1) Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang, 050061,1) Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang, 050061,2) Key Laboratory of karst Dynamics, Ministry ofLand and Resources & Guangxi Zhuang Autonomous Region, Institute of Karst Geology, CAGS, Guilin, Guangxi, 541004 and 2) Key Laboratory of karst Dynamics, Ministry ofLand and Resources & Guangxi Zhuang Autonomous Region, Institute of Karst Geology, CAGS, Guilin, Guangxi, 541004 |
| |
| Abstract: | Evapotranspiration is the key link between the atmospheric process and terrestrial hydrological process, which plays an important role in water cycle processes and water balance on the regional/basin scales. In karst area, suface ecological environment is fragile and sensitive to climate change. Evapotranspiration may be the key eco- hydrological process associated with atmospheric, water, energy exchange and carbon cycle. Therefore, accurate estimation of evapotranspiration plays an important role in better understand of the karst water cycle in response to climate change, carbon cycle and ecological restoration. In this study, the potential evapotranspiration ET 0 in Guilin city was calculated by using the Penman- Monterith method based on the daily meteorological data from Guilin meteorological station during the period from 1951 to 2015. The Mann- Kendall test and correlation analysis were used to determine the trend of potential evapotranspiration and its influencing factors in Guilin city. Results show that potential evapotranspiration in Guilin has a significant annual, interannual and seasonal changes. The ET 0 in Guilin from 1951 to 2015 had a significant decreasing trend with a rate of -8.02 mm/10a on the annual scale. Decreasing trends were observed in summer, autumn and winter, while a slightly increaseing trend was observed in spring. Significant annual decreasing trend of ET 0 in Guilin could be concluded as mostly affected by the decline of summer ET 0 . Abrupt changes for ET 0 series were detected in 1967 and 2003. The results of Mann- Kendall trend test and correlation analysis show that average, maximum and minimum air temperatures have increased significantly over the past 65 years, whilst wind speed, relative humidity and sunshine duration exhibited significant decreasing trends. Sunshine duration was the major factor dominating variability of ET 0 in Guilin from 1951 to 2015, followed by wind speed. |
| |
| Keywords: | Potential evapotranspiration Penman- Monteith trend sunshine duration climate change |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《地质学报》浏览原始摘要信息 |
| 点击此处可从《地质学报》下载免费的PDF全文 |
|
