Global Warming Vs Cold Weather

Lund, Sweden December 2010

The world warmest globally recoded years are 1998 & 2005, the current year 2010 on the track to join this warmest year table. On the other hand Europe and other part of the world facing colder-than-normal winter this year. 

The word Global warming creating confusion in mind. Global warming one of the hottest topic now a days. According to the 2007 Fourth Assessment Report by the Intergovernmental Panel on Climate Change (IPCC), global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the 20th century and different Climate model projections summarized in the latest IPCC report indicate that the global surface temperature is likely to rise a further 1.1 to 6.4 °C (2.0 to 11.5 °F) during the 21st century. (For IPCC report please Click Here) 

If average surface temperature of the earth is increasing then why Europe and other part of the world in 2010 experiencing colder-than-normal winter? Peoples are thinking whether the Global Warming threat ends?

Global Warming refers to changes in frequency and intensity of extreme weather events (heat waves, high precipitation, floods, droughts, Record Snowfall). Some of these extremes weather events recorded in 2010

• Unusually heavy monsoons in Pakistan that brought the worst flooding in that country's history.
• A record-smashing heat wave in Russia last summer.
• a season record snowfall for Washington, D.C.

Global Warming News

Report: Global Warming Issue From 2 Or 3 Years Ago May Still Be Problem

WASHINGTON—According to a report released this week by the Center for Global Development, climate change, the popular mid-2000s issue that raised awareness of the fact that the earth's continuous rise in temperature will have catastrophic ecological effects, has apparently not been resolved, and may still be a problem.

Source and for detali story: http://www.theonion.com/articles/report-global-warming-issue-from-2-or-3-years-ago,18431/?utm_source=recentnews



NOVEMBER 10, 2010 | ISSUE 46•45

Hydrological Cycle (Feedback)

                First Phase

1.      As Surface temperature increase its increase the evaporation (+ve feedback)

2.      As evaporation increase its decrease the surface temperature (-ve feedback)

3.      As evaporation increase, water vapour in the atmosphere also increase ( +ve feedback)

4.      With increase in water vapour in atmosphere, surface temperature also increase. (+ve feedback)

Second Phase

5.      Water vapour increase, relative humidity also increase (+ve feedback)

6.      Relative humidity lead to increase cloud cover (+ve feedback)

7.      But due to condensation increase in cloud cover reduce water content in the atmosphere (-ve feedback)

8.      Surface temperature decrease with increase in relative humidity (-ve feedback)

Third Phase

9.      Greater cloud cover mean low radiation (-ve feedback)

10.  Also greater cloud cover leads to low incoming solar radiation (-ve feedback)

11.  High radiation means high surface temperature(+ve feedback)

12.  But high outgoing radiation reduce surface temperature (-ve feedback)

13.  On the other hand high incoming radiation increase surface temperature (+ve feedback)

                                                                                                                                                                Source: Guy Schurger lecture

Environmental change impacts on major biomes

1)      Amazon tropical rainforest

+2.5 degrees C

Increase Total NPP 0.149

Decrease Tropical broadleaved evergreen -0.087

Decrease Tropical broadleaved raingreen 0.062

Decrease Warm grass    -0.168

Precipitation -10%

No changes at all

CO2x2 (Double)

Increase Total NPP 0.449

Increase Tropical broadleaved evergreen 0.255

Increase Tropical broadleaved raingreen 0.193

No changes Warm grass               

Combined

Increase Total NPP 0.309

Increase Tropical broadleaved evergreen 0.165

Increase Tropical broadleaved raingreen 0.144

Slight increase Warm grass 0.002

Environmental change impacts on major biomes

1)      Southern Sweden temperate forest

+4 degrees C

decrease in total NPP (0.551 -0.46=0.091kgC/m2yr)

Temperate needleleved evergreen (0.326-0.247=0.079)

Temperate broadleafed summergreen (0.182-0.166=0.016)

Cool grass (0.043-0.047=-0.004)

→ all PFTs decreasing

Precipitation +10%

decrease in total NPP (0.551 -0.575=-0.024kgC/m2yr)

Temperate needleleved evergreen (0.326-0.336=-0.01)

Temperate broadleafed summergreen (0.182-0.194=-0.012)

Cool grass (0.043-0.045=-0.002)

→ almost no changes

CO2x2 (Double)

decrease in total NPP (0.551 -0.746=-0.195kgC/m2yr)

Temperate needleleved evergreen (0.326-0.267=0.059)

Temperate broadleafed summergreen (0.182-0.267=-0.085)

Cool grass (0.043-0.056=-0.013)

→ all PFTs increasing

Combined

increase in total NPP (0.551 -0.71=-0.159kgC/m2yr)

Temperate needleleved evergreen (0.326-0.378=-0.052)

Temperate broadleafed summergreen (0.182-0.272=-0.079)

Cool grass (0.043-0.06=-0.017)

→ all PFTs increasing

Siberia Boreal

     Siberia Boreal (Environmental Impacts on major biomes)

+5 degrees C

increasing in total NPP (0.392 -0.426= - 0.034kgC/m2yr)

Cool grass (0392-0.426=-0.034)

→ all PFTs increasing

Precipitation +20%

increasing in total NPP = - 0.008kgC/m2yr)

Cool grass = - 0.008)

→ all PFTs increasing

CO2x2

increasing in total NPP =- 0.081kgC/m2yr)

Cool grass =-0.081)

→ all PFTs increasing

Combined

increase in total NPP = -0.142kgC/m2yr)

Cool grass =-0.142

IPCC at the High Level Summit on Climate Change

Nearly 100 world leaders accepted UN Secretary-General Ban Ki-moon's invitation to participate in an historic Summit on Climate Change.  During the opening ceremony, the Chairman of the IPCC,  Mr R.K. Pachauri addressed the Summit.

Summit of Climate Change

“Failure to reach broad agreement in Copenhagen would be morally inexcusable, economically short-sighted and politically unwise,” the Secretary-General said in his opening address. “Now is the moment to act in common cause.”

"There is little time left. The opportunity and responsibility to avoid catastrophic climate change is in your hands," Mr. Ban said, closing the day-long Summit on Climate Change.

The Summit marked the first UN visit for the Presidents of China and the United States as well as the newly elected Prime Minister of Japan.

Reasons of Ocean Change

A successful attempt has been made to assess the causes of observed sea level rise. During the peaked of last ice-age (21,000 years ago) the average global sea level was 120m lower than today. As fresh water continue to add into the oceans from melting down of ice sheets and glaciers, sea level rose over a meter per century. Global mean sea level change results from two major processes, mostly related to recent climate change, that alter the volume of water in the global ocean: i) thermal expansion, and ii) the exchange of water between oceans and other reservoirs (glaciers and ice caps, ice sheets, other land water reservoirs - including through anthropogenic change in land hydrology, and the atmosphere).Vertical land movements such as resulting from glacial isostatic adjustment (GIA), tectonics, subsidence and sedimentation influence local sea level measurements but do not alter ocean water volume; nonetheless, they affect global mean sea level through their alteration of the shape and the volume of the ocean basins containing the water. 


Meier.F and J.Whar in 2002 have explained this in much more detail in their article "Sea level is rising: Do we know why?" which can be found on "PNAS May 14, 2002 vol. 99 no. 10, 6524–6526.". So I would recommend this as further reading.