Evapotranspiration at a secondary forest and a bare land in Central Amazonia

亚马逊流域中部次生林和裸地的蒸散量

• 批准号: 21500999
• 负责人: TSUCHIYA Akio
• 金额: $ 3万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21500999/
• 关键词: アマゾン; 再生林; 天然林; 牧場; 蒸散; 蒸発; 土壌水分; 水収支; 裸地; 乾期; 裸地(草地); 蒸発散; 雨期; サップフロー; デンドロバンド; 中部アマゾン

Micro-meteorological and stem sap flow measurements were repeated five times from 2009 to 2011 at a primary forest, a secondary forest, and a pasture in central Amazonia. The evapotranspiration was estimated to be 8. 1-17. 2 t/ ha/ day for the secondary forest, and that for the primary forest was 10. 9-24. 3 t/ ha/ day, respectively. The daily evaporation at the pasture was calculated to be 8. 2-28. 7 t/ ha, and that of precipitation was 16. 1-112. 7 t/ ha. When the pasture was covered with grass, the evaporation was larger than the evapotranspiration at forests, while when the livestock had eaten the grass, the evaporation fell below the evapotranspiration. In the latter case, temperatures increased near the ground surface and the air-filled porosity expanded with the progress of evaporation. The cancellation of grazing expansion policies and conversion to secondary forests will be important steps to stopping the drying and warming of Amazonia.

2009 年至 2011 年，在亚马逊流域中部的原始林、次生林和牧场重复了五次微气象和茎液流测量。蒸散量估计为 8. 1-17。次生林2吨/公顷/天，原始林10。9-24。分别为 3 吨/公顷/天。计算牧场日蒸发量为8. 2-28。 7吨/公顷，降水量16。1-112。 7吨/公顷。当牧场被草覆盖时，蒸发量大于森林的蒸散量，而当牲畜吃完草时，蒸发量低于蒸散量。在后一种情况下，地表附近的温度升高，充满空气的孔隙度随着蒸发的进行而扩大。取消放牧扩张政策和改建次生林将是阻止亚马逊流域干燥和变暖的重要步骤。

项目成果

Changes inn evapotran spiiration and CO_2 flux acccom panying ththe land use change from forests to pastures in central Amazonia

亚马逊流域中部土地利用从森林到牧场的变化导致蒸散量和CO_2通量的变化

• 发表时间: 2012
• 期刊: Pappemrs of the Applied Geograpphy Conference 35
• 作者: 吉田美幸・長澤良太;ほか;Tsuchiya Akioo
• 通讯作者: Tsuchiya Akioo

Soil CO_2 flux betweeen a pastture and a foreest floor in Noovo Aripuana along the Madeira River, AM.

上午马德拉河沿岸 Noovo Aripuana 牧场和森林地面之间的土壤 CO_2 通量。

• 发表时间: 2011
• 作者: 篠崎蓉子・長澤良太;ほか;土谷彰男;高橋勇・長澤良太;Tsuchiya Akkio
• 通讯作者: Tsuchiya Akkio

二酸化炭素メースで見たアマゾナス州南部の変容に関する研究

用二氧化碳狼牙棒观察亚马逊南部地区转变的研究

• 发表时间: 2011
• 期刊: 三井物産環境基金研究助成成果報告書
• 作者: 篠崎蓉子・長澤良太;ほか;土谷彰男
• 通讯作者: 土谷彰男

Soil CO_2 flux between a pasture and a forest floor in Novo Aripuana along the Madeira River, AM

上午马德拉河沿岸新阿利普阿纳牧场和森林地面之间的土壤 CO_2 通量

• 发表时间: 2011
• 作者: 篠崎蓉子・長澤良太;ほか;土谷彰男;高橋勇・長澤良太;Tsuchiya Akkio;小玉芳敬;Akio Tsuchiya
• 通讯作者: Akio Tsuchiya