杭州市土地覆被变化与碳收支空间分异测度  

Land cover change and the spatial differentiation of carbon budget in Hangzhou

作　　者：张善峰[1,2] 宋彦[3,4] 李昌峰[5] 黄初冬[2] 

机构地区：[1]浙江工业大学城乡发展与人居环境设计研究中心 [2]浙江工业大学城市规划系 [3]深圳大学城市规划系 [4]美国北卡罗来纳大学教堂山分校城市与区域规划系 [5]南京财经大学经济学院统计学系

出　　处：《城市问题》2015年第6期46-53,共8页Urban Problems

基　　金：国家自然科学青年基金项目(41301176)

摘　　要：以杭州市为例,采用物料衡算法测算了城市人类活动的释碳量,采用植被生物量法测算了城市遗留自然生态系统的固碳量。结果显示:杭州市及各区土地覆被呈现建设用地对耕地的显著捕获且上升速度较快;杭州市整体的碳收支水平处于赤字状态、收支比逐年降低,城市系统内部无法实现碳收支平衡;耕地与林地是杭州市两个最重要的固碳子系统。杭州市及各区的固碳损失主要是由于耕地向建设用地转化造成的。杭州市各区均处于碳赤字状态,缺口呈上升态势(上城区除外),在空间上表现为"东—中—西"到"东—西—中"递减;碳赤字密度呈增长态势(下城区除外),在空间上表现为"中—东—西"递减;杭州市及各区的经济发展对碳环境压力步入下行通道。Taking Hangzhou city for example, this essay applies two methods： one is material balance algorithm which is aimed to caleulate carbon emissions by human respiratory and fossil energy consumption, and the other is vegetation biomass method to calculate carbon fixation of the city ecosystem. The results show that： the land cover shows the trend that construction land has captured the farmland remarkably and the transformation speed still accelerates. The carbon budget is in the deficit and the balance of carbon could not be accomplished in Hangzhou City. Agriculture and forest are the most carbon fixation system of Hangzhou City, land cover changing from the agriculture to construction land is the main reason of carbon fixation loss of Hangzhou City and its districts. All the districts of Hangzhou City are in carbon deficit and the spatial pattern of it reduces progressively from east, west to middle. Per area carbon deficit is in state of rise except the Xiacheng District and the spatial pattern of it increases progressively from west, east to middle. Economic growth and CO2 emission is on a decoupling status of Hangzhou City and its Districts, and the carbon press on environment of economic growth declines.

关 键 词：地表覆被 碳收支 空间分异 格局 杭州 

分 类 号：X511[环境科学与工程—环境工程]