date: Tue, 15 Jun 1999 19:01:19 +0100 (BST) from: Suraje Dessai subject: Re: sea level! to: Mike Hulme After several re-runs I got the same results over and over. Digging up a bit deeper I found out that Glacier, Greenland and Antartic melting (for 5.5xCO2) are all lower than for 4.5xCO2; sea expansion being higher as would be expected. I think there must be some other parameter (in the sea-level model) we need to change. Could you run MAGICC with 5.5xCO2 and one of your SRES scenarios just to double check? I think Tom or Sarah probably know the answer to this problem. Mark has given me an introductoty guide to IDL for my "light" reading travelling so I hope to be an "expert" next week! I'll e-mail you when I get back and have some new results. Suraje On Tue, 15 Jun 1999, Mike Hulme wrote: > Something seems wrong here ...... I cannot think why sea-level is less > sensitive to a 5.5 dT than to a 4.5dT. > > Check again. > > Mike > > At 08:37 15/06/99 +0100, you wrote: > >Mike, > >When I was building the matrices I found something strange. All sea-level > >rise for 5.5 climate sensitivity is smaller than for 4.5 sensitivity (a > >sample is below): > > > >0.5 1.5 2.5 3.5 4.5 5.5 > >0.4 18.1 24.9 59.2 70.9 102.2 87.1 > >1.1 17 23 56.1 67.3 97.7 82.6 > >1.8 15.9 21 52.8 63.4 92.9 77.9 > > > >Is this normal? I thought I had made some mistake and re-ran MAGICC but I > >got the same values. Is there some kind of threshold in-built in MAGICC? > >If this is abnormal let me know. > >Suraje > > > ***************************************************************************** > Dr Mike Hulme > Reader in Climatology tel: +44 1603 593162 > Climatic Research Unit fax: +44 1603 507784 > School of Environmental Science email: m.hulme@uea.ac.uk > University of East Anglia web site: http://www.cru.uea.ac.uk/~mikeh/ > Norwich NR4 7TJ > ***************************************************************************** > Annual mean temperature in Central England during 1999 > is about +1.6 deg C above the 1961-90 average > *************************************************** > The global-mean surface air temperature anomaly for 1998 > was +0.57 deg C above the 1961-90 average, the warmest year yet recorded > ***************************************************************************** >