Old Climate Change Formula no Longer Exists, Say Scientists

Sep 16th, 2014 | By | Category: Advocacy, Development and Climate Change, Mitigation, News

VBK-CLIMATE_CHANGE_2108867fIANS: The traditional formula on climate change that says that regions that have a moist climate will experience additional rainfall is no longer valid, scientists say.

The old formula that dry gets drier and wet gets wetter (DDWW) is less universally valid than previously assumed, stressed a team of climate researchers from the Swiss Federal Institute of Technology (ETHZ) in Zurich.

“Our results emphasise how we should not overly rely on simplifying principles to asses past developments in dryness and humidity. This can be misleading, as it cannot do justice to the complexity of the underlying systems,” said Peter Greve from ETHZ and the lead author of the study.

Traditional analyses using metrics could describe climate characteristics above the ocean, but not over land.

In their new study, ETHZ researchers led by co-author Sonia Seneviratne, a professor for land-climate dynamics, took into account the specific climatic properties of land surfaces where the amount of available water is limited compared with the ocean.

For the study, they compared data from between 1948 and 1968 and 1984 to 2004 which allowed them to extract trends in terms of a region’s humidity and dryness.

They found that there was no obvious trend towards a drier or wetter climate across three-quarters of the land and only half of this surface area follows the DDWW principle.

Some regions which should have become wetter according to the simple DDWW formula have actually become drier in the past — this includes parts of the Amazon, Central America, tropical Africa and Asia, found the team.

However, the DDWW principle does still apply to the oceans, concluded the study that appeared in the journal Nature Geoscience.



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One Comment to “Old Climate Change Formula no Longer Exists, Say Scientists”

  1. Pawan Singh says:

    panel discussion on climate change condition has scattered views, it is a subject most comprehensive study in this regard. various formula for the assessment and analysis of data and survey reports describe from different angles putting their theories for open discussion,hence the recent decades changes that the pattern of different parameters related with the theory of climate change if we analysed the set pattern of it we would find that we could not say firmly that the every set parameter slightly change the result compared with the old data and reports. so that the several additional factors and parameters which are directly or indirectly influenced the study must be considered in the new study of climate change.It is common views and observed that the climatic conditions has been changed that is basis of regional and different geographical area of earth.In the recent years that we have observed the hectic monsoon conditions alerts the scientist have to need further study and broaden the more comprehensive research study not only conclude the idea of data analysis behind the past study ,although it is important and helpful to draw new research study of climate change.

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