Collaborative Research: Global Cloud Climatology from Surface Observations: Analyses and Decadal Update

合作研究：来自地面观测的全球云气候学：分析和十年更新

• 批准号: 0630396
• 负责人: Carole Hahn
• 金额: --
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0630396&HistoricalAwards=false
• 关键词: Collaborative; Research; Global; Cloud; Climatology

Intellectual merit: A study of the global distribution of the various cloud types and their seasonal and diurnal variations, as well as a study of how clouds have changed in the past half-century, are underway. Databases are being created that are designed to be useful in clarifying the interactions of clouds with other components of the climate system and to infer changes in cloud radiative forcing. For global-change studies involving clouds, a long period of record with global coverage and with consistent observing procedures is necessary. Routine surface weather observations of clouds from land stations and from ships in the ocean meet these requirements. Under two previous NSF grants the PIs have produced a climatology of cloud-type amounts for 5-degree and 10-degree grid boxes, seasonally and monthly, for eight times per day for the years 1952-1997 over the oceans and 1971-1996 over land. For this renewed research project, both databases will be updated with cloud observations for the decade 1997-2006. Arrangements will also be made for continuation of routine updating of the cloud-observations database for the ocean after termination of this project. The analysis of interannual variations and trends for land and ocean will be updated to 2006. A number of studies will be done to examine characteristics of the data: describing diurnal cycles, comparing day trends to night trends, comparing island observations to those of nearby ships, quantifying uncertainties in regional and global time-series, investigating interannual variations and trends of Arctic clouds, and determining the relation of cloud base height to sea-surface temperature. Broader impact: The broader impact of the research is in the area of climate research. The databases produced under this project will be distributed widely for use by the scientific community. They will find applications in climate modeling, cloud process studies, and in detection and attribution of climate change.

智力优点：目前正在研究各种云类型的全球分布及其季节和日变化，以及研究过去半个世纪云的变化。 目前正在建立数据库，这些数据库旨在有助于澄清云与气候系统其他组成部分的相互作用，并推断云辐射强迫的变化。 对于涉及云的全球变化研究，需要有覆盖全球的长期记录和一致的观测程序。 从陆地观测站和海洋中的船只对云层进行的常规地面天气观测符合这些要求。根据NSF先前的两项赠款，PI已经制作了1952-1997年海洋和1971-1996年陆地上每天8次的5度和10度网格箱的云型量气候学。 对于这一更新的研究项目，两个数据库都将更新1997-2006年十年的云观测。 还将作出安排，在该项目结束后继续例行更新海洋云观测数据库。对陆地和海洋年际变化和趋势的分析将更新到2006年。 将进行一些研究，以审查数据的特点：描述昼夜周期，比较白天趋势和夜间趋势，比较岛屿观测和附近船只观测，量化区域和全球时间序列的不确定性，调查北极云层的年际变化和趋势，确定云底高度与海面温度的关系。更广泛的影响：研究的更广泛影响是在气候研究领域。 在这个项目下建立的数据库将广泛分发，供科学界使用。 他们将在气候建模，云过程研究以及气候变化的检测和归因中找到应用。