Scientists have long debated the impact on global climate of water evaporated from vegetation. New research from Carnegie’s Global Ecology department concludes that evaporated water helps cool the earth as a whole, not just the local area of evaporation, demonstrating that evaporation of water from trees and lakes could have a cooling effect on the entire atmosphere. These findings, published on 14 September in Environmental Research Letters, have major implications for land-use decision making.
The researchers even thought it was possible that evaporation could have a warming effect on global climate, because water vapour acts as a greenhouse gas in the atmosphere.
Using a climate model, they found that increased evaporation actually had an overall cooling effect on the global climate. Continue Reading →
Where the fudges have judges
UPDATE 1, 16 Sep 9:30 – If anyone harbours lingering doubts that NIWA claim to have used a particular method in calculating the adjustments in their “Review report” published last December, let them check NIWA’s web site, where they say: “The methodology for adjusting for site changes in the NZ temperature record was published in the peer-reviewed International Journal of Climatology in 1993: Rhoades, D.A. and Salinger, M.J., 1993: Adjustment of temperature and rainfall records for site changes. Int. Journal of Climatology 13, 899 – 913.
UPDATE 2, 16 Sep 10:15 – Looking through NIWA’s web site this morning I discovered a seriously fraudulent statement. On the national temperature record review page there’s a section at the bottom that describes (and makes light of) our judicial review application in the High Court and makes this astonishing claim: “The reanalysis and peer review of the seven station series forms part of the judicial review action.” But that’s impossible — NIWA announced the review six months before we filed the papers with the court! Wayne Mapp, the Minister, had already announced NIWA’s review of the 7SS on 18 February 2010, and we didn’t lodge our application with the court until 16 August 2010, so is NIWA claiming to have extra-sensory perception? Is there a serial fraudster running NIWA’s media centre? Why can’t that organisation just tell the truth?
The New Zealand Climate Science Education Trust (NZCSET), on 1 July 2011, filed an amended statement of claim to challenge NIWA’s revised NZ temperature record (the old 7SS, now called the NZT7) published in December, and NIWA failed to file a statement of defence within the time limit. A tentative agreement to meet and narrow the issues was advised to the Court but has not been followed up. NIWA has not responded to correspondence in recent weeks. Continue Reading →