File:BAMS climate assess boulder water vapor 2002 - 2.png

没有更高的分辨率。

BAMS_climate_assess_boulder_water_vapor_2002_-_2.png （775 × 425像素，文件大小：12 KB，MIME类型：image/png）

本文件并非来自中文维基百科，而是来自维基共享资源。请参阅维基共享资源上的详细描述、讨论页、页面历史、日志。

维基共享资源是一个储存自由版权作品的项目。您可以向此项目作出贡献。

摘要

描述

English: Stratospheric water vapor 1% increase. 30% may be due to increased methane.

Observations using balloon-borne frost-point hygrometers, have detected an approximately 1% per year increase in stratospheric water vapor at Boulder, Colorado, since 1980. Besides implications for climate change, increased water vapor can affect the rate of chemical ozone loss, for example, by increasing the incidence of polar stratospheric clouds. Satellite measurements of water vapor, although not of adequate length for accurate trend determination, suggest that the increase may extend to other latitudes.[1]
Observations have provided evidence for a widespread increase in stratospheric water vapor, which plays a role both in cooling the lower stratosphere and in depleting ozone through chemical interactions, thereby contributing to climate processes. However, the water vapor trends are not fully defined, nor are their cause understood.[2]
Stratospheric water vapor measurements at a single location (Boulder, Colorado, U.S., 40°N) for the period 1981-2000 show a statistically significant increase of approximately 1%/year over altitudes 15-28 km. For the shorter period 1991-2001, global satellite measurements covering latitudes 60°N-60°S show a similar trend of 0.6-0.8%/year for altitudes ~25-50 km, but no significant trend at lower altitudes. The increases in water vapor are substantially larger than can be explained by tropospheric methane trends. Characterization of stratospheric water vapor trends is limited by the lack of global long-term measurements.[3]

此graph图片可使用矢量图形重新创建为SVG文件。这具有很多好处；更多信息请参见共享资源:待清理媒体。如果存在此图片的SVG格式，请将其上传，然后将此模板替换为{{vector version available|新图片名称}}。

建议您将SVG命名为“BAMS climate assess boulder water vapor 2002 - 2.svg”，这样在使用Vector version available（或Vva）模板时就不需要填写新图片名称参数。

来源 http://www.cmdl.noaa.gov/hotitems/watervapor.html

作者 NOAA

本图像属于公有领域，因该作品最初来自于美国国家海洋和大气管理局职员的职务作品。

日期/时间	大小	用户	备注
2006年7月5日, 13:42:17	775 × 425 (13969 bytes)	Nils Simon (留言 · 贡献)	{{PD-USGov-DOC-NOAA}}

点击某个日期/时间查看对应时刻的文件。

	日期/时间	缩⁠略⁠图	大小	用户	备注
当前	2014年8月21日 (四) 12:21		775 × 425（12 KB）	GifTagger	Bot: Converting file to superior PNG file. (Source: BAMS_climate_assess_boulder_water_vapor_2002.gif). This GIF was problematic due to non-greyscale color table.

以下页面使用本文件：

以下其他wiki使用此文件：