發(fā)布時間：2018-06-05 12:35

  本文選題：潛在植被 + 綜合順序分類系統(tǒng)（CSCS）　； 參考：《西北師范大學(xué)》2014年碩士論文

【摘要】：陸地生態(tài)系統(tǒng)是陸地生命系統(tǒng)的支撐系統(tǒng)，植被—?dú)夂蚴侨祟愘囈陨娴幕A(chǔ)條件。植被處于陸地表層和大氣圈之間，，對大氣和土壤的變化異常敏感，而潛在植被研究可反映立地植被與氣候的真實關(guān)系，有助于人類認(rèn)識陸地生態(tài)系統(tǒng)與氣候系統(tǒng)。通過對某一地區(qū)潛在植被的研究可以了解到立地植被的發(fā)展趨勢和該區(qū)自然環(huán)境條件下應(yīng)分布的頂極植物群落，并可反映該區(qū)域的氣候類型。通過比較不同氣候變化情景下同一區(qū)域的潛在植被，可分離出潛在植被對氣候變化的敏感性和不敏感性地區(qū)，以期為區(qū)域生態(tài)恢復(fù)和潛在植被研究提供科學(xué)參考。 本文基于擁有自主知識產(chǎn)權(quán)的植被——?dú)夂蚰Ｐ停壕C合順序分類系統(tǒng)（CSCS），利用IPCC4發(fā)布的A1B、A2及B1情境下2070-2099年氣象數(shù)據(jù)（空間分辨率為30″）對中國潛在植被的分布進(jìn)行了模擬研究，并對不同情景下的潛在植被分布圖進(jìn)行比較分析，得出以下主要結(jié)論： (1)基于GIS，在A1B、A2及B1情境下利用CSCS分類系統(tǒng)對中國潛在植被分布模擬的中國潛在植被分布，地帶性規(guī)律顯著。模擬的中國潛在植被分布圖較好的體現(xiàn)出我國潛在植被在南北方向上的緯向地帶性規(guī)律、東西方向上的干濕地帶性規(guī)律，以及水熱隨海拔分布的垂直帶譜規(guī)律； (2)2070-2099年，中國在A1B、A2及B1情境下分布的潛在植被類依次為40類、41類及39類；不同氣候變化情景下發(fā)育的中國潛在植被在類型、數(shù)量及各類在不同情境下所占比例均存在差異，經(jīng)比較分析：中國區(qū)域的氣候條件不適合炎熱極干熱帶荒漠（ⅦA）的形成。 (3)中國陸地有64.10%的敏感性地區(qū)，分布的潛在植被對立地氣候變化相當(dāng)敏感。敏感性地區(qū)的潛在植被很容易隨氣候的變化而發(fā)生適應(yīng)性演替。 (4)中國陸地有35.90%的不敏感性區(qū)，當(dāng)不敏感性區(qū)的氣候發(fā)生變化時，分布的潛在植被在一定程度上不隨氣候的變化而發(fā)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

本文編號：1982006