Calibration and validation studies over the North Atlantic and UK for the Global Precipitation Mission

全球降水任务在北大西洋和英国的校准和验证研究

• 批准号: NE/L007169/1
• 负责人: Alessandro Battaglia
• 金额: $ 33.71万
• 依托单位: University of Leicester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FL007169%2F1
• 关键词: Calibration; validation; studies; over; North

Understanding the changing global precipitation patterns that result from a changing climate represents one of the great research priorities of the next decades. In order to better define the future we need to understand the present and the inter-annual variability of the precipitation cycle, which mirrors, in short periods, the expected climate-change-induced long-term variability. However, while observational studies based on the past 30 year records suggest rises in precipitation and evaporation at a global rate of 6-7%/K, global and regional climate models predict a muted response of the hydrologic cycle (2-3%/K). Quantitative estimation and prediction of precipitation still remain grand challenges in the hydrological and atmospheric sciences, both carrying huge uncertainties and thus preventing us from solving the previous conundrum. Observation-wise surface precipitation varies on spatial scales ranging from tens of meters to hundreds of kilometers, thus inhibiting the determination of spatio-temporal structures of precipitation fields from pointwise measurements only (e.g. rain gauges). Active and passive space-borne microwave measurements (precipitation radars, multi-wavelength radiometers) are considered to be suitable for estimating day and night-time precipitation rates and distributions on a planetary scale. Thanks to a satellite constellation concept the NASA-JAXA Global Precipitation Mission, due to launch early in 2014, promises to produce a significant step forward in improving coverage and reducing uncertainties in global precipitation products at a level sufficient to critically challenge numerical models. The presence of a first-ever-in-space dual frequency radar in the core satellite, with coverage up to 65 degrees latitude, will allow not only to know how much rain falls at the surface but also the detailed three-dimensional knowledge of rain, snow, and other forms of precipitation within the atmosphere above the surface and, with it, the links and the transfer of latent heat energy between the Earth's surface and atmosphere. This is an unprecedented opportunity in the mid-latitudes.In our effort, by specifically focusing on UK and on the North Atlantic region, we will address two scientific objectives: 1) To quantify, understand, and potentially mitigate regime dependent biases that are present in today's passive microwave rainfall retrieval over ocean; 2) to critically assess the potential of Global Precipitation Mission-era passive microwave rainfall over mid-latitude coastal and rural areas. The UKMO radar network will be used as ground-reference for the satellite products; as a result, improvements on radar-based rainfall estimates over UK are expected as well. In addition, through improved measurements of precipitation globally, the Global Precipitation Mission will help advancing our understanding of Earth's water and energy cycle, improving forecasting of extreme events that cause natural hazards and disasters, and extending current capabilities in using accurate and timely information of precipitation to directly benefit society. This project will foster and help UK scientists and UK society in taking full advantage of such a unique opportunity.

了解气候变化导致的全球降水模式的变化是未来几十年的重大研究重点之一。为了更好地定义未来，我们需要了解降水周期的现在和年际变化，这在短期内反映了预期的气候变化引起的长期变化。然而，尽管基于过去30年记录的观测研究表明，全球降水量和蒸发量以6-7%/K的速度上升，但全球和区域气候模型预测，水文循环的反应较弱(2-3%/K)。降水的定量估计和预测仍然是水文和大气科学中的重大挑战，两者都带有巨大的不确定性，从而使我们无法解决先前的难题。观测到的地表降水量在几十米到数百公里的空间尺度上变化，从而阻碍了仅通过逐点测量(例如雨量计)来确定降水场的时空结构。主动和被动星载微波测量(降水雷达、多波长辐射计)被认为适用于估计行星尺度上的白天和夜间降雨率和分布。由于卫星星座概念，定于2014年初发射的NASA-日本宇宙航空研究开发机构全球降水任务有望在提高覆盖率和减少全球降水产品的不确定性方面向前迈出重要一步，其水平足以对数值模式构成严重挑战。在覆盖纬度高达65度的核心卫星上首次安装空间双频雷达，不仅可以了解地表的降雨量，还可以详细了解地表上方大气中的雨、雪和其他形式的降水，以及与之相关的地球表面和大气之间的联系和潜热传递。这在中纬度地区是一个前所未有的机会。在我们的努力中，通过特别关注英国和北大西洋地区，我们将解决两个科学目标：1)量化、理解并潜在地减轻当今海洋上被动微波降雨反演中存在的与体制有关的偏差；2)严格评估全球降水任务时代中纬度沿海和农村地区被动微波降雨的潜力。UKMO雷达网将被用作卫星产品的地面参考；因此，预计英国上空基于雷达的降雨量估计也将有所改善。此外，通过改进对全球降水的测量，全球降水任务将有助于增进我们对地球水和能量循环的了解，改进对造成自然灾害和灾害的极端事件的预报，并扩大目前利用准确和及时的降水信息直接造福社会的能力。该项目将促进和帮助英国科学家和英国社会充分利用这一独特的机会。

项目成果

The Dual Wavelength Ratio Knee: A Signature of Multiple Scattering in Airborne Ku-Ka Observations

双波长比拐点：机载 Ku-Ka 观测中多重散射的特征

• DOI: 10.1175/jamc-d-13-0341.1
• 发表时间: 2014
• 期刊: Journal of Applied Meteorology and Climatology
• 影响因子: 3
• 作者: Battaglia A

Hail-Detection Algorithm for the GPM Core Observatory Satellite Sensors

GPM 核心天文台卫星传感器的冰雹检测算法

• DOI: 10.1175/jamc-d-16-0368.1
• 发表时间: 2017
• 期刊: Journal of Applied Meteorology and Climatology
• 影响因子: 3
• 作者: Mroz K

Rain retrieval from dual-frequency radar Doppler spectra: validation and potential for a midlatitude precipitating case-study

从双频雷达多普勒频谱中反演降雨：中纬度降水案例研究的验证和潜力

• DOI: 10.1002/qj.3010
• 发表时间: 2017
• 期刊: Quarterly Journal of the Royal Meteorological Society
• 影响因子: 8.9
• 作者: Tridon F

Global Precipitation Measuring Dual-Frequency Precipitation Radar Observations of Hailstorm Vertical Structure: Current Capabilities and Drawbacks

全球降水测量双频降水雷达冰雹垂直结构观测：目前的能力和缺点

• DOI: 10.1175/jamc-d-18-0020.1
• 发表时间: 2018
• 期刊: Journal of Applied Meteorology and Climatology
• 影响因子: 3
• 作者: Mroz K

Capability of GPM IMERG Products for Extreme Precipitation Analysis over the Indonesian Maritime Continent

• DOI: 10.3390/rs14020412
• 发表时间: 2022-01
• 期刊: Remote. Sens.
• 作者: Ravidho Ramadhan;M. Marzuki;H. Yusnaini;R. Muharsyah;W. Suryanto;Sholihun Sholihun-Sholihun;M. Vonnisa;A. Battaglia;H. Hashiguchi