• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Wiley-Blackwell Online Open >Quantifying global dust devil occurrence from meteorological analyses
【2h】

Quantifying global dust devil occurrence from meteorological analyses

机译：通过气象分析量化全球沙尘暴的发生

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Dust devils and nonrotating dusty plumes are effective uplift mechanisms for fine particles, but their contribution to the global dust budget is uncertain. By applying known bulk thermodynamic criteria to European Centre for Medium-Range Weather Forecasts (ECMWF) operational analyses, we provide the first global hourly climatology of potential dust devil and dusty plume (PDDP) occurrence. In agreement with observations, activity is highest from late morning into the afternoon. Combining PDDP frequencies with dust source maps and typical emission values gives the best estimate of global contributions of 3.4% (uncertainty 0.9–31%), 1 order of magnitude lower than the only estimate previously published. Total global hours of dust uplift by dry convection are ∼0.002% of the dust-lifting winds resolved by ECMWF, consistent with dry convection making a small contribution to global uplift. Reducing uncertainty requires better knowledge of factors controlling PDDP occurrence, source regions, and dust fluxes induced by dry convection.Key Points class="unordered" style="list-style-type:disc">Global potential dust devil occurrence quantified from meteorological analyses Climatology shows realistic diurnal cycle and geographical distribution Best estimate of global contribution of 3.4% is 10 times smaller than the previous estimate
机译：尘埃和不旋转的粉尘羽流是细颗粒的有效提升机制，但它们对全球粉尘预算的贡献尚不确定。通过将已知的整体热力学标准应用于欧洲中型天气预报中心（ECMWF）的运行分析，我们提供了全球第一个每小时每小时潜在的尘埃魔鬼和粉尘羽流（PDDP）发生的气候学。与观察结果一致，从清晨到下午，活动最为活跃。将PDDP频率与粉尘源图和典型排放值结合使用，可得出全球贡献的最佳估计值是3.4％（不确定性0.9-31％），比以前公布的唯一估计值低1个数量级。全球通过干对流扬尘的总小时数约为ECMWF解决的扬尘风的0.002％，这与干对流相一致，对全球扬尘的贡献很小。减少不确定性需要更好地了解控制干对流引起的PDDP发生，源区域和粉尘通量的因素。要点 class =“ unordered” style =“ list-style-type：disc”> <！-list-behavior = unordered prefix-word = mark-type = disc max-label-size = 0-> 从气象学分析中量化的全球潜在尘埃恶魔发生率 气候学显示了现实的昼夜周期和地理分布 对全球贡献的最佳估计为3.4％，比先前的估计小10倍

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号