RELATED ARTICLESMORE FROM AUTHOR It looks like it’s time to bring out the winter woollies again this week – with a major cold snap forecast for the next few days.Met Eireann says the worst of the weather will be over the weekend – but it will hit first on Thursday.The cold snap means snow and sleet will hit many parts of the country – but the North-west will be worst affected.Ground temperatures are also expected to hit as low as minus ten degrees at night.Vincent O’Shea of Met Eireann says the weekend will see the worst of the weather.[podcast]http://www.highlandradio.com/wp-content/uploads/2010/11/shea1pm.mp3[/podcast] By News Highland – November 23, 2010 Facebook Previous article87-year-old Donegal man to be sentenced next week for raping granddaughtersNext articleDerry man jailed for his role in Emmett Shields murder News Highland Twitter Main Evening News, Sport and Obituaries Tuesday May 25th 365 additional cases of Covid-19 in Republic Pinterest Gardai continue to investigate Kilmacrennan fire Man arrested on suspicion of drugs and criminal property offences in Derry WhatsApp Facebook Google+ 75 positive cases of Covid confirmed in North News Further drop in people receiving PUP in Donegal WhatsApp Google+ Cold snap set to hit North West and Ulster this weekend Pinterest Twitter
Determining how climate fluctuations affect ocean ecosystems requires an understanding of how biologicaland physical processes interact across a wide range of scales. Here we examine the role of physical andbiological processes in generating fluctuations in the ecosystem around South Georgia in the SouthAtlantic sector of the Southern Ocean. Anomalies in sea surface temperature (SST) in the South Pacificsector of the Southern Ocean have previously been shown to be generated through atmosphericteleconnections with El Nin˜o Southern Oscillation (ENSO)-related processes. These SST anomalies arepropagated via the Antarctic Circumpolar Current into the South Atlantic (on time scales of more than1 year), where ENSO and Southern Annular Mode-related atmospheric processes have a direct influenceon short (less than six months) time scales.We find that across the South Atlantic sector, these changes inSST, and related fluctuations in winter sea ice extent, affect the recruitment and dispersal of Antarctic krill.This oceanographically driven variation in krill population dynamics and abundance in turn affects thebreeding success of seabird and marine mammal predators that depend on krill as food. Such propagatinganomalies, mediated through physical and trophic interactions, are likely to be an important component ofvariation in ocean ecosystems and affect responses to longer term change. Population models derived onthe basis of these oceanic fluctuations indicate that plausible rates of regional warming of 1oC over the next100 years could lead to more than a 95% reduction in the biomass and abundance of krill across the ScotiaSea by the end of the century.