ESA Lakes Climate Change Initiative (Lakes_cci): Lake products, Version 1.0

This dataset contains various global lake products (1992-2019) produced by the European Space Agency (ESA) Lakes Climate Change Initiative (Lakes_cci) project.Lakes are of significant interest to the scientific community, local to national governments, industries and the wider public. A range of scientific disciplines including hydrology, limnology, climatology, biogeochemistry and geodesy are interested in distribution and functioning of the millions of lakes (from small ponds to inland seas), from the local to the global scale. Remote sensing provides an opportunity to extend the spatio-temporal scale of lake observation. The five thematic climate variables included in this dataset are:• Lake Water Level (LWL): a proxy fundamental to understand the balance between water inputs and water loss and their connection with regional and global climate changes.• Lake Water Extent (LWE): a proxy for change in glacial regions (lake expansion) and drought in many arid environments, water extent relates to local climate for the cooling effect that water bodies provide.• Lake Surface Water temperature (LSWT): correlated with regional air temperatures and a proxy for mixing regimes, driving biogeochemical cycling and seasonality. • Lake Ice Cover (LIC): freeze-up in autumn and advancing break-up in spring are proxies for gradually changing climate patterns and seasonality. • Lake Water-Leaving Reflectance (LWLR): a direct indicator of biogeochemical processes and habitats in the visible part of the water column (e.g. seasonal phytoplankton biomass fluctuations), and an indicator of the frequency of extreme events (peak terrestrial run-off, changing mixing conditions).Data generated in the Lakes_cci project are derived from data from multiple instruments and multiple satellites including; TOPEX/Poseidon, Jason, ENVISAT, SARAL, Sentinel, Landsat, ERS, Terra/Aqua, Suomi NPP, Metop and Orbview. For more information please see the product user guide in the documents.

本数据集包含欧洲空间局（European Space Agency，ESA）湖泊气候变化倡议（Lakes Climate Change Initiative，Lakes_cci）项目生成的1992-2019年全球各类湖泊产品。
湖泊不仅受到科学界、从地方到国家各级政府、产业界乃至广大公众的高度关注。包括水文学、湖沼学、气候学、生物地球化学与大地测量学在内的诸多学科，均关注从局地到全球尺度下数百万个湖泊（从小型池塘到内陆海）的分布与功能。遥感技术为拓展湖泊观测的时空尺度提供了可行途径。
本数据集涵盖五大主题气候变量：
• 湖泊水位（Lake Water Level，LWL）：作为理解水体收支平衡及其与区域、全球气候变化关联的核心替代指标。
• 湖泊水域范围（Lake Water Extent，LWE）：可作为冰川区域变化（湖泊扩张）与多数干旱环境干旱状况的替代指标；水域范围还与局地气候相关，因水体具有降温效应。
• 湖泊表层水温（Lake Surface Water Temperature，LSWT）：与区域气温存在相关性，可作为水体混合状态的替代指标，其驱动生物地球化学循环与季节动态。
• 湖泊冰盖（Lake Ice Cover，LIC）：秋季封冻与春季解冻提前的现象，可作为气候模式与季节节律逐步变化的替代指标。
• 湖泊水体离水反射率（Lake Water-Leaving Reflectance，LWLR）：可直接反映水柱可见光波段内的生物地球化学过程与生境状况（如浮游植物生物量的季节波动），同时也是极端事件（如地表径流峰值、混合条件变化）发生频率的指示指标。
本项目生成的数据源自多类仪器与多颗卫星，包括：TOPEX/Poseidon、Jason、ENVISAT、SARAL、Sentinel、Landsat、ERS、Terra/Aqua、Suomi NPP、Metop及Orbview。
更多信息请参阅文档中的产品用户指南。