不同气候变化情景下的2070-2099年中国潜在植被研究

发布时间：2018-06-05 12:35

  本文选题：潜在植被 + 综合顺序分类系统（CSCS）　； 参考：《西北师范大学》2014年硕士论文

【摘要】：陆地生态系统是陆地生命系统的支撑系统，植被—气候是人类赖以生存的基础条件。植被处于陆地表层和大气圈之间，，对大气和土壤的变化异常敏感，而潜在植被研究可反映立地植被与气候的真实关系，有助于人类认识陆地生态系统与气候系统。通过对某一地区潜在植被的研究可以了解到立地植被的发展趋势和该区自然环境条件下应分布的顶极植物群落，并可反映该区域的气候类型。通过比较不同气候变化情景下同一区域的潜在植被，可分离出潜在植被对气候变化的敏感性和不敏感性地区，以期为区域生态恢复和潜在植被研究提供科学参考。 本文基于拥有自主知识产权的植被——气候模型：综合顺序分类系统（CSCS），利用IPCC4发布的A1B、A2及B1情境下2070-2099年气象数据（空间分辨率为30″）对中国潜在植被的分布进行了模拟研究，并对不同情景下的潜在植被分布图进行比较分析，得出以下主要结论： (1)基于GIS，在A1B、A2及B1情境下利用CSCS分类系统对中国潜在植被分布模拟的中国潜在植被分布，地带性规律显著。模拟的中国潜在植被分布图较好的体现出我国潜在植被在南北方向上的纬向地带性规律、东西方向上的干湿地带性规律，以及水热随海拔分布的垂直带谱规律； (2)2070-2099年，中国在A1B、A2及B1情境下分布的潜在植被类依次为40类、41类及39类；不同气候变化情景下发育的中国潜在植被在类型、数量及各类在不同情境下所占比例均存在差异，经比较分析：中国区域的气候条件不适合炎热极干热带荒漠（ⅦA）的形成。 (3)中国陆地有64.10%的敏感性地区，分布的潜在植被对立地气候变化相当敏感。敏感性地区的潜在植被很容易随气候的变化而发生适应性演替。 (4)中国陆地有35.90%的不敏感性区，当不敏感性区的气候发生变化时，分布的潜在植被在一定程度上不随气候的变化而发生演替。
[Abstract]:Terrestrial ecosystem is the supporting system of terrestrial life system. Vegetation-climate is the basic condition for human survival. Vegetation is very sensitive to the changes of atmosphere and soil, and the study of potential vegetation can reflect the true relationship between site vegetation and climate, which is helpful to human understanding of terrestrial ecosystem and climate system. Through the study of the potential vegetation in a certain area, we can know the development trend of site vegetation and the apical plant communities that should be distributed under the natural environment in this area, and can reflect the climatic type of the region. By comparing potential vegetation in the same region under different climate change scenarios, the sensitivity and insensitivity of potential vegetation to climate change can be separated, In order to provide a scientific reference for the study of regional ecological restoration and potential vegetation. Based on the vegetation-climate model with independent intellectual property rights: a comprehensive sequential classification system, this paper uses A1BUA2 and B1 released by IPCC4 for 2070-2099 years. Data (spatial resolution of 30 ") were used to simulate the distribution of potential vegetation in China. The main conclusions are as follows: based on GISs, the potential vegetation distribution in China is simulated by CSCS classification system under the circumstances of A1BX A2 and B1. The zonality of the potential vegetation distribution in China is significant. The simulated distribution map of potential vegetation in China well reflects the zonal characteristics of potential vegetation in China in the north and south direction, the dry-wet zonal pattern in the east-west direction, and the vertical band spectrum of water and heat distribution with elevation. In China, the distribution of potential vegetation in A _ 1B _ 2 / A _ 2 and B _ 1 scenarios was 40, 41 and 39, respectively, and there were differences in the types, quantity and proportion of different types of potential vegetation in China under different climate change scenarios. The climatic conditions in China are not suitable for the formation of tropical desert (鈪

本文编号：1982006