MERRA-2 tavgM_2d_slv_Nx: 2d,Monthly mean,Time-Averaged,Single-Level,Assimilation,Single-Level Diagnostics 0.625 x 0.5 degree V5.12.4 (M2TMNXSLV) at GES DISC

M2TMNXSLV (or tavgM_2d_slv_Nx) is a time-averaged 2-dimensional monthly mean data collection in Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2). This collection consists of meteorology diagnostics at popularly used vertical levels, such as air temperature at 2-meter (or at 10-meter, 850hPa, 500 hPa, 250hPa), wind components at 50-meter (or at 2-meter, 10-meter, 850hPa, 500hPa, 250 hPa), sea level pressure, surface pressure, and total precipitable water vapor (or ice water, liquid water). The collection also includes variance of certain parameters.

MERRA-2 is the latest version of global atmospheric reanalysis for the satellite era produced by NASA Global Modeling and Assimilation Office (GMAO) using the Goddard Earth Observing System Model (GEOS) version 5.12.4. The dataset covers the period of 1980-present with the latency of ~3 weeks after the end of a month.

Data Reprocessing: Please check “Records of MERRA-2 Data Reprocessing and Service Changes” linked from the “Documentation” tab on this page. Note that a reprocessed data filename is different from the original file.

MERRA-2 Mailing List: Sign up to receive information on reprocessing of data, changing of tools and services, as well as data announcements from GMAO. Contact the GES DISC Help Desk ([e-mail]) to be added to the list.

Questions: If you have a question, please read "MERRA-2 File Specification Document", “MERRA-2 Data Access – Quick Start Guide”, and FAQs linked from the ”Documentation” tab on this page. If that does not answer your question, you may email the question on data access to the GES DISC Help Desk ([e-mail]), or the question on science to the MERRA-2 science team ([e-mail]).

M2TMNXSLV（或tavgM_2d_slv_Nx）系现代时代回顾性分析用于研究和应用版本2（MERRA-2）中的时间平均二维月平均数据集。本数据集包括在常用垂直层次上的气象诊断数据，例如2米（或10米、850hPa、500hPa、250hPa）处的空气温度，50米（或2米、10米、850hPa、500hPa、250hPa）处的风速分量，海平面气压，地表气压以及总可降水量（或冰水、液态水）。此外，还包括某些参数的方差。
MERRA-2是美国宇航局全球建模和同化办公室（GMAO）利用第五版戈达德地球观测系统模型（GEOS）5.12.4开发的最新全球大气再分析产品，针对卫星时代。该数据集覆盖1980年至现在的时间段，每月末后约3周提供更新。
数据重处理：请查阅本页面“文档”标签下提供的“MERRA-2数据重处理和服务变更记录”，请注意重处理后的数据文件名与原始文件不同。
MERRA-2邮件列表：请注册以接收有关数据重处理、工具和服务变更以及GMAO数据公告的信息。如需加入列表，请联系GES DISC帮助台（[e-mail]）。
疑问解答：如有疑问，请先阅读本页面“文档”标签下的“MERRA-2文件规范文档”、“MERRA-2数据访问快速入门指南”和常见问题解答。若上述内容仍无法解答您的疑问，您可以通过电子邮件向GES DISC帮助台（[e-mail]）咨询数据访问问题，或向MERRA-2科学团队（[e-mail]）咨询科学问题。