摘要
揭示大兴安岭北部气候变化敏感区的气候生产潜力演变及其影响机理,对于维持东北地区生态系统平衡具有重要意义。基于标准树轮年表反演气象资料与研究区13个气象站观测数据组成的1707—2014年气象资料序列,利用Miami模型和小波分析等方法,分析了大兴安岭北部气候生产潜力演变及其对气候变化的响应。结果显示:1707年以来,气温、降水、蒸散和标准气候生产潜力变化均表现极显著增加趋势,标准气候生产潜力(W)变化率为1.79 kg hm^(-2)a^(-1),20世纪气候倾向率最大为10.14kg hm^(-2)a^(-1),温度气候生产潜力(WT)与降水气候生产潜力(WR)的比值21世纪最大,水热配比状态最好;4种气候生产潜力存在不同时间尺度的周期变化,但变化一致性较好,主周期均为215—219a;大兴安岭北部W呈现一致的正变化趋势,高值、次高值、低值中心分别在根河、塔河、鄂伦春偏南地区,振幅由西北向东南逐渐递减;W与年气温、降水量、蒸散量正相关显著,年平均气温每升高1℃、年降水量和蒸散量均增加10 mm,W变化率依次为453.71、74.40、219.01 kg/hm^2,且气温是影响W的主要因子;未来"暖湿型"气候对森林植被生长有利,而"冷干型"气候对森林植被生长不利,气候生产潜力增加(减少)幅度均为10.9%—21.7%。研究结果不仅可为区域尺度内研究森林植被气候生产潜力提供基础方法,而且对进一步估算森林碳汇、即将实施的碳交易及中国北部边疆生态安全研究和生态功能规划制定等具有重要参考价值。
Understanding the evolution and mechanisms of climate-induced potential productivity in the climate change sensitive regions of northern Da Hinggan Mountain are fundamental for maintaining the ecosystem balance of northeastern China. The present study employed a meteorological data series from 1707 to 2014 by using standard tree-ring chronology data collection methods and observations from 13 weather stations in northern Da Hinggan Mountain region. Using a Miami model and wavelet analysis, we analyzed the evolution of climate-induced potential productivity and its response to climate change. Results show that four types of climate-induced potential productivity （air temperature, precipitation, evapotranspiration, and standard climate-induced potential productivity （W）） have increased significantly （P ≤ 0.001 ）since 1707. W has increased at a rate of 1.79 kg hm-2 a-1 in this region since 1707. During the 20th century, the change rate of W caused by climate change peaked at 10.14 kg hm 2 a-1. During the 19th century, the change rate of W caused by climate change reached a minimum of 0.50 kg hm-2 a-1. These values of W were in the mid-range for the 18th（ 0.66 kg hm-2 a-l） and the 21st（4.79 kg hm-2 a-1） ） centuries. The value of W for the analyzed centuries was ranked as the 21st〉20th〉18th 〉19th century. The ratio of temperature potential productivity （Wr） to precipitation potential productivity （WR） peaked in the 21st century; this century also experienced the highest correlation between precipitation and temperature. The different time scales in the four types of climate-induced potential productivity changed periodically in the wavelet analysis, but was relatively consistent. The first major periodic oscillation of the wavelet analysis was 215-219 years, and other major periodic oscillations in wavelet analysis were at 138, 138, 136, 138 years. W showed a consistently positive trend in northern Da Hinggan Mountain, high, sub-high, and low values of W in Genhe, Tahe, and southe
出处
《生态学报》
CAS
CSCD
北大核心
2017年第6期1900-1911,共12页
Acta Ecologica Sinica
基金
国家自然科学基金(41165005
40865005)
黑龙江省气象局重点项目(HQZD2015002)联合资助
关键词
森林植被
Miami模型
气候生产潜力
气候变化
forest vegetation
miami model
climate-induced potential productivity
climate change
