Low frequency variability in globally integrated tropical cyclone power dissipation
Low frequency variability in globally integrated tropical cyclone power dissipation
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DOI：
10.1029/2006gl026167
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发表时间：
2006-06
影响因子：
5.2
通讯作者：
R. Sriver;M. Huber
中科院分区：
文献类型：
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作者：
R. Sriver;M. Huber
欧洲中期天气预报中心 40 年再分析 (ERA-40) 项目的地面风和温度记录用于估计 1958 年至 2001 年全球综合热带气旋 (TC) 强度的低频变化。首次在全球范围内明确计算年度综合功率耗散 (PD)，结果显示在 ERA-40 项目期间的大部分时间 PD 呈上升趋势，尽管我们认为这至少部分是由于ERA-40 中的气旋表示。将我们估计的 PD 趋势与 Emanuel (2005) 的 PD 近似值进行比较，发现 1978 年之后有很好的一致性，这与 ERA-40 中主要卫星观测系统时代的开始相一致。低通（>60个月）过滤的PD时间序列与年平均热带温度相关，因此该结果与热带温度可能直接调节TC综合强度的假设一致。
Surface wind and temperature records from the European Centre for Medium‐ Range Weather Forecasts 40 Year Reanalysis (ERA‐40) Project are used to estimate low‐frequency variations in globally integrated tropical cyclone (TC) intensity from 1958 to 2001. For the first time, the annually integrated power dissipation (PD) is explicitly calculated on a global scale, and results show an upward trend in PD during much of the ERA‐40 project period, although we argue this is at least partially due to limitations in cyclone representation in ERA‐40. Comparing our estimated trend in PD with Emanuel's (2005) approximation to PD reveals good agreement after 1978, coinciding with the onset of a major satellite observing‐system epoch in ERA‐40. The low pass (>60 months) filtered PD time series correlates with mean annual tropical temperature, thus this result is consistent with the hypothesis that tropical temperatures may directly regulate the integrated intensity of TCs.