| 辽宁省净初级生产力时空演变及其对地形因子的响应 |
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| 引用本文： | 李雨鸿,陶苏林,李荣平,王婷,周斌,李晶,刘东明.辽宁省净初级生产力时空演变及其对地形因子的响应[J].气象与环境学报,2021,37(5):107-112. |
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| 作者姓名： | 李雨鸿 陶苏林 李荣平 王婷 周斌 李晶 刘东明 |
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| 作者单位： | 辽宁省生态气象和卫星遥感中心,辽宁 沈阳110166;南京大桥机器有限公司技术开发中心,江苏 南京211101;中国气象局沈阳大气环境研究所,辽宁 沈阳110166 |
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| 基金项目： | 国家自然科学基金辽宁联合基金重点支持项目(U1808201);辽宁省气象局科研项目(202009) |
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| 摘 要： | 植被净初级生产力（NPP）是评估生态环境质量的重要指标之一，为了探明辽宁省生态环境变化，利用MODIS-NDVI数据及CASA模型，对辽宁省2000—2018年NPP进行估算，并在此基础上分析了近19 a辽宁省NPP时空变化特征及其对地形因子的响应。结果表明：2000—2018年辽宁省植被NPP呈波动上升趋势，空间分布特征为东部高西部低；NPP变化趋势率为2.89 gC·m-2·a-1，其中，87.4%的地区呈增加趋势，且辽西北地区波动变化最为显著；高程和坡度对NPP变化的影响明显高于坡向；随着高程增加，NPP表现为先增加后平稳的趋势，高程500 m左右出现NPP最大值；随着坡度增加，NPP表现为先增加后略有减小的趋势，坡度35°左右出现NPP最大值；在高程为500 m以上、坡度为15°—35°范围内，NPP值最大。
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| 关 键 词： | CASA模型 NPP 高程 坡度 坡向 |
| 收稿时间： | 2020-08-03 |
Temporal and spatial evolution of NPP and its responses to terrain factors in Liaoning province |
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| Yu-hong LI,Su-lin TAO,Rong-ping LI,Ting WANG,Bin ZHOU,Jing LI,Dong-ming LIU.Temporal and spatial evolution of NPP and its responses to terrain factors in Liaoning province[J].Journal of Meteorology and Environment,2021,37(5):107-112. |
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| Authors: | Yu-hong LI Su-lin TAO Rong-ping LI Ting WANG Bin ZHOU Jing LI Dong-ming LIU |
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| Institution: | 1. Ecological Meteorology and Satellite Remote Sensing Center of Liaoning Province, Shenyang 110166, China2. Technology Development Center, Nanjing Daqiao Machine Co., Ltd., Nanjing 211101, China3. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110166, China |
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| Abstract: | Vegetation net primary productivity (NPP) is one of the most important indicators for assessing the quality of the ecological environment. In order to detect the changes of the ecological environment in Liaoning province, the MODIS-NDVI data and CASA model were used to estimate the NPP in Liaoning province from 2000 to 2018. Based on the estimated NPP, the temporal and spatial characteristics of NPP in Liaoning province and the relationships between NPP and topographic factors in the past 19 years were analyzed. The results show that vegetation NPP has a fluctuating upward trend in Liaoning province from 2000 to 2018, and the spatial distribution characteristics show that NPP in the east is higher than that in the west. The trend rate of NPP is 2.89 g C·m-2·a-1. The statistic shows that 87.4% of the areas have an increasing trend in NPP, and the fluctuations in northwestern Liaoning province are the most obvious. Elevation and slope have a more obvious impact than slope direction on the change of NPP. With the increase of elevation, NPP shows an increasing trend at first and then keeps stable, and the maximum NPP is at an elevation of 500 m. As the slope increases, NPP shows an increasing trend first and then decreasing slightly with the highest value was obtained in the lands of slope at 35°. The NPP value is the largest when the elevation is above 500 m and the slope is within the range of 15° to 35°. |
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| Keywords: | CASA model Net primary productivity (NPP) Elevation Slope Slope direction |
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