Wetlands MEaSUREs

Wetlands are ecologically dynamic land areas that support more biological diversity than any other type of ecosystem on the planet. In addition to supporting an astonishing variety of plants and animals, wetlands filter and purify water, control flooding, and stabilize shorelines. However, as sources of fish, fuel, land, and water, wetlands are threatened around the globe as the demand for these resources grows. Remote sensing provides a means of identifying and observing changes occurring in these critical ecosystems.Synthetic Aperture Radar (SAR) uses microwave energy to detect physical properties of the Earth’s surface. Unlike optical technology, SAR can image through darkness, clouds, and rain. The characteristics of SAR make it a particularly effective tool for measuring water inundation, seasonal variations in water levels or habitat, large-scale vegetation patterns, and the effects of natural or human disturbance on wetland areas.The Alaska Satellite Facility (ASF) DAAC acquired the MEaSUREs (Making Earth System Data Records for Use in Research Environments) Wetlands dataset from the Jet Propulsion Laboratory in 2012. The dataset contains the first level-2, derived synthetic aperture radar (SAR) products available from ASF. The dataset includes a global-scale Earth System Data Record (ESDR) of inundated wetlands to facilitate investigations on their role in climate, biogeochemistry, hydrology, and biodiversity. This ESDR provides an accurate, consistent, and comprehensive global-scale dataset of wetland inundation and vegetation, including continental-scale, multi-temporal, and multi-year monthly inundation dynamics at varying scales.MEaSUREs Wetlands is a NASA/Jet Propulsion Laboratory Earth observation project.For a project overview and detailed descriptions of satellite/sensor parameters, data product characteristics, and using MEaSUREs Wetlands products: Click here to download the MEaSUREs Wetlands Product Specification Guide (PDF) Wetlands Project Personnel Principal Investigator:Kyle C. McDonald, Ph.D.Terry Elkes Professor, Department of Earth and Atmospheric SciencesCUNY Environmental Crossroads Initiative and CREST InstituteThe City College of New York, City University of New YorkMR 925, 160 Convent Ave. & W. 138th St., New York, NY 10031 USAPhone: 212-650-8218; Mobile: [phone]; FAX: [phone]ANDJet Propulsion Laboratory, California Institute of Technology4800 Oak Grove Drive; Pasadena, California 91109-8099 U.S.A. Project MembersBruce Chapman (JPL)Laura Hess (University of California, Santa Barbara)Mahta Moghaddam (University of Michigan)John Kimball (University of Montana) CollaboratorsDr. Martti Hallikainen (Helsinki University of Technology)Ake Rosenqvist (JRC — Italy)Masanobu Shimada (EORC-JAXA — Japan)Max Finlayson (International Water Management Institute)Nick Davidson (Ramsar)Wenjun Chen (CCRS)Albert Jimenez (Columbia University)Adane Metaferia (California State University, Chico)

湿地是生态动态的土地区域，其生物多样性支持能力超越地球上任何其他生态系统。除支撑令人瞩目的植物和动物种类之外，湿地还能够过滤和净化水源，控制洪水，并稳定海岸线。然而，鉴于湿地作为鱼类、燃料、土地和水源的供给，在全球范围内正受到日益增长的资源需求的威胁。遥感技术为识别和观察这些关键生态系统中发生的变革提供了一种手段。合成孔径雷达（SAR）利用微波能量探测地球表面的物理特性。与光学技术不同，SAR能够在黑暗、云层和雨中成像。合成孔径雷达的特性使其成为测量洪水淹没、水位季节性变化或栖息地、大规模植被模式以及自然或人为干扰对湿地区域影响的一种特别有效的工具。阿拉斯加卫星设施（ASF）数据获取中心于2012年从喷气推进实验室获取了MEaSUREs（为研究环境制作地球系统数据记录）湿地数据集。该数据集包含了ASF可提供的首个二级、派生的合成孔径雷达（SAR）产品。数据集包括一个全球尺度的地球系统数据记录（ESDR），用以研究湿地在气候、生物地球化学、水文学和生物多样性中的作用。这一ESDR提供了一组准确、一致且全面的全球尺度湿地淹没和植被数据集，包括大陆尺度、多时相和多年度的月度淹没动态，覆盖不同尺度。MEaSUREs湿地项目是NASA/喷气推进实验室的一项地球观测项目。有关项目概述、卫星/传感器参数的详细描述、数据产品特性以及使用MEaSUREs湿地产品的方法，请点击此处下载MEaSUREs湿地产品规范指南（PDF）。湿地项目人员：首席研究员：Kyle C. McDonald博士，Terry Elkes教授，地球与大气科学系，纽约市立大学城市学院，纽约州纽约市MR 925，160 Convent Ave. & W. 138th St.，10031美国；电话：212-650-8218；移动电话：818-434-8937；传真：212-650-7064。及喷气推进实验室，加州理工学院，4800 Oak Grove Drive；加利福尼亚州帕萨迪纳，91109-8099美国。项目成员：Bruce Chapman（JPL），Laura Hess（加州大学圣巴巴拉分校），Mahta Moghaddam（密歇根大学），John Kimball（蒙大拿大学）。合作者：Dr. Martti Hallikainen（赫尔辛基工业大学），Ake Rosenqvist（JRC——意大利），Masanobu Shimada（EORC-JAXA——日本），Max Finlayson（国际水资源管理研究所），Nick Davidson（拉姆萨尔），Wenjun Chen（CCRS），Albert Jimenez（哥伦比亚大学），Adane Metaferia（加利福尼亚州立大学奇科分校）。