1982年から1999年にかけての地球上の陸上の純一次生産の気候変動による増加
Ramakrishna R Nemani1, Charles D Keeling, Hirofumi Hashimoto
1School of Forestry, University of Montana, Missoula, MT 59801, USA. nemani@ntsg.umt.edu
まとめ
世界的な気候変動により,植物の成長が加速し,世界の純一次生産が6%増加しました. この改善は,主に気候の制約が緩和されたことによるもので,アマゾンの熱帯雨林が最も顕著な利益を示しています.
科学分野:
- エコロジー エコロジー エコロジー
- 気候科学 気候科学
- リモートセンシング (リモートセンサー)
背景:
- 最近の気候の変化は,より高い緯度で植物の成長を促進しています.
- 以前の分析では,変動する制限要因を考慮して,植物の生産性に対する気候変動の影響の包括的な見方が欠けていました.
研究 の 目的:
- 気候変動に対する植物の反応に関する世界的な調査を実施する.
- 気候変動下での植物成長に対する変数制限因子の影響を分析する.
主な方法:
- 18年間の気候データ (1982年−1999年) の分析.
- 植生活動の衛星観測を用いて.
- 純一次生産 (NPP) の変化を評価する.
主要な成果:
- 世界の純一次生産は18年間で6% (3.4ペタグラムの炭素) 増加した.
- 気候変動は,植物の成長に対する重要な制約を緩和しました.
- 熱帯の生態系,特にアマゾンの熱帯雨林は,雲の覆いが減り,太陽放射線が増加したために,NPPの最大の増加を示しました.
結論:
- 世界的な気候変動は,植物の生産性にも良い影響を与えています.
- 雲の覆いの減少と太陽放射線の増加は,熱帯地域の強化された原子力発電所の主要な原動力です.
- この研究は,変化する気候条件下で,世界の炭素吸収における熱帯生態系の重要な役割を強調しています.
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