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19 05, 2021

Climate Change and Water Supply

2021-05-19T05:29:36-07:00Categories: Blog, Climate, Nora Harlow, Water|Tags: , |

Global temperatures have been rising at least since the middle of the last century, and most projections anticipate that this trend will continue. Effects of warming vary from one region of the world to another but prominently include the likelihood that precipitation will shift from snow to rain in many snow-fed watersheds. It is also likely that snow will melt faster and run off earlier, changing the timing of peak streamflow. Snow is an important, even critical, seasonal water source for many regions with large mountain ranges, including most summer-dry climates. Snowpack accumulates in the mountains in winter when demand

27 01, 2021

The Many Faces of Summer-Dry

2021-02-16T06:16:26-08:00Categories: Blog, Climate|Tags: , |

Summer-dry climates are not dry climates. They are climates where rain falls mostly in winter. This is not a common arrangement. In most of the world, rain falls in summer or is fairly well distributed year round. Summer-dry climates are usually found on the west coasts of continents in the mid-latitudes where seasonally shifting atmospheric pressure cells block or open up to the jet stream and its storms. The photo above shows a coastal northern California climate in summer. The photo below shows a similar coastal northern California climate in winter or spring. Summer-dry climates vary considerably from one place

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