关闭地球能量储存的全球季节性循环
Gregory C Johnson1, Felix W Landerer2, Norman G Loeb3
1NOAA/Pacific Marine Environmental Laboratory, Seattle, WA 98115 USA.
Surveys in geophysics
|December 30, 2024
概括
科学家们量化了地球的数量.
科学领域:
- 气候科学 气候科学
- 地球系统科学 地球系统科学
- 大气科学 大气科学
背景情况:
- 全球季节性能源预算对于了解气候动态至关重要.
- 之前的研究在平衡能源预算方面遇到了挑战,因为数据有限,特别是在高度海洋.
- 精确的能源预算关闭对于验证气候模型和了解气候变化至关重要.
研究的目的:
- 量化地球气候系统中的全球季节性能源循环.
- 通过使用最新的观察方法,实现全球季节性能源预算的结束.
- 确定不同地球系统组件的季节性能源储存的主要驱动因素和时间.
主要方法:
- 利用观测数据和气候再分析量化全球季节性能源周期.
- 删除了长期气候趋势,以关注季节变化.
- 海洋热量含量的垂直整合限制在季节性热储存深度,改进了以前的方法,整合到2000m.
- 分析了大气顶部 (TOA) 和海洋,大气,陆地和冰组成部分内的能量流.
主要成果:
- 通过改进海洋热量含量计算,在统计不确定性范围内成功关闭了全球季节性能源预算.
- 海洋主导着季节性能量储存,由于其大面积和热惯性,在4月达到峰值,与南半球夏至相比有所滞后.
- 大气和陆地储能周期较小,由于北半球陆地占主导地位和不同的热惯性,它们的峰值较晚 (分别为7月和9月).
结论:
- 精细的海洋热量含量计算方法使全球季节性能源预算的关闭成为可能.
- 储能季节性循环主要由海洋驱动,大气和陆地的贡献部分相互抵消.
- 精确量化季节性能源预算对于推动气候科学和改善气候模型预测至关重要.
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