报告题目： Recent reversal in loss of global terrestrial biomass
报告时间： 2015年5月20日（周三）上午：10:00-11:30
报告地点： 北辰楼329会议室
主 持 人： 王国杰 教授
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地理与遥感学院
2015年5月15日
报告人简介：
研究领域主要是陆面水文遥感机理和多源卫星数据融合方法，在全球尺度上研发土壤湿度、植被含水量、蒸散发等关键陆面水文变量的长序列数据产品，并用以研究气候变化条件下的水循环特征。研发了覆盖全球的长序列（>30年）逐日土壤湿度数据和植被含水量数据，并作为欧洲空间局的官方产品向全球用户发布，受到国际社会的广泛关注和应用。第一作者发表论文9篇，单篇平均影响因子>6，包括Nature子刊（Nature Climate Change）一篇。合作发表Nature论文两篇，BAMS论文四篇。总引用率超过680余次，H-index为14。
报告摘要：
Vegetation change plays a critical role in the Earth’s carbon budget and its associated radiative forcing in response to anthropogenic and natural climate change. Existing global estimates of aboveground biomass carbon (ABC) based on field survey data provide brief snapshots that are limited to forest ecosystems only. An entirely new remote sensing approach was recently developed to derive global monthly ABC estimates for both forest and non-forest biomes during the last two decades from passive microwave observations onboard a series of platforms. It is estimated that a global ABC of 362 Pg C around the year 2000, of which 65% is in forests and 17% in savannas. Over the period 1993-2012, an insignificant decline trend was found globally, mostly resulting from the loss of tropical forests and net gains in mixed forests over boreal and temperate regions and tropical savannas and shrublands. Inter-annual ABC patterns are greatly influenced by the strong response of water-limited ecosystems to rainfall variability, particularly savannas. From 2003 onwards, forest expansion in Russia and China, tropical deforestation decline, and increasing ABC associated with wetter conditions in the savannas of northern Australia and southern Africa together reversed global ABC loss and led to an increase, consistent with trends in the global carbon sink. 本报告内容发表于Nature Climate Change.