പ്രകൃതി - കാലാവസ്ഥ - ആഗോള താപനം

 

പ്രകൃതിക്ക് പല അർത്ഥങ്ങൾ ഉണ്ട്. പ്രകൃതിയാൽ എന്നാൽ തുടക്കത്തിൽ തന്നെ എന്ന് പറയും , ചില സംസ്‍കാരങ്ങളിൽ സ്ത്രീ എന്ന അർത്ഥവുമുണ്ട്. എനിക്ക് തോന്നുന്നു ഭാരതീയ സംസ്കാരത്തിൽ ..ഒരു പക്ഷെ ഇംഗ്ളണ്ടിലും അങ്ങനെയുണ്ടെന്ന് തോന്നുന്നു പ്രവചനാതീതം എന്ന രീതിയിൽ , ഒരു ലോകത്തിന്റെ പല സ്ഥലങ്ങളിൽ വാക്കുകൾ ഉപയോഗിച്ചു ചില കൽപിത അർഥങ്ങൾ വന്ന ചേർന്നിട്ടുണ്ടാകാം. എന്നാൽ പരിതഃസ്ഥിതി എന്ന വാക്കിന്റെ കൃത്യമായ അർത്ഥം ചുറ്റുപാടുമുള്ള സ്ഥിതി അല്ലെങ്കിൽ നമ്മുടെ ചുറ്റുമുള്ള  സ്ഥിതി എന്ന അർത്ഥമായി നാം പരിഗണിക്കുന്നു.

പദ്ധതികൾ എന്താണ് നയങ്ങൾ എന്താണ്

നദി പുഴ , മറ്റു ജലസ്ത്രോതസുകളുടെ സംരക്ഷണം

മലയോര മേഖല

കാർഷിക മേഖല

വന മേഖല

നാഷണൽ ഹെറിറ്റേജ്  ആൻഡ് culture

 

----------------------  Green House Gas

കാലാവസ്ഥ വ്യതിയാനം

Water Vapour – Behaviour fundamentally different from other gases.

CO2 Most Significant – Combustion, Respiratory System, Decay.

Methane – Wetlands, Frozen places, glaciers, burning bio waste

Challenges

70% energy used for manufacturing is gas and petroleum

92% of transportation by petroleum

Human caused Green Gas emission is 70%

WMO – World Meteorological Org

The latest analysis of observations from the WMO GAW Programme shows that globally averaged surface mole fractions(1) calculated from this in situ network for carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) reached new highs in 2017, with CO2 at 405.5 ± 0.1 ppm(2), CH4 at 1859 ± 2 ppb(3) and N2O at 329.9 ± 0.1 ppb. These values constitute, respectively, 146%, 257% and 122% of pre-industrial (before 1750) levels.

The science is clear. Without rapid cuts in CO₂ and other greenhouse gases, climate change will have increasingly destructive and irreversible impacts on life on Earth. The window of opportunity for action is almost closed,” said WMO Secretary-General Petteri Taalas.

“The last time the Earth experienced a comparable concentration of CO₂ was 3-5 million years ago, when the temperature was 2-3°C warmer and sea level was 10-20 meters higher than now,” said Mr Taalas.

The WMO Greenhouse Gas Bulletin reports on atmospheric concentrations  of greenhouse gases. Emissions represent what goes into the atmosphere. Concentrations represent what remains in the atmosphere after the complex system of interactions between the atmosphere, biosphere, lithosphere, cryosphere and the oceans. About a quarter of the total emissions is absorbed by the oceans and another quarter by the biosphere.

A separate Emissions Gap Report by UN Environment (UNEP), to be released on 27 November, tracks the policy commitments made by countries to reduce greenhouse gas emissions.

The WMO and UNEP reports come on top of the scientific evidence provided by the Intergovernmental Panel on Climate Change (IPCC) Special Report on Global Warming of 1.5°C. This said that net emissions of CO₂ must reach zero (the amount of CO₂ entering the atmosphere must equal the amount that is removed by sinks, natural and technological) around 2050 in order to keep temperature increases to below 1.5°C. It showed how keeping temperature increases below 2°C would reduce the risks to human well-being, ecosystems and sustainable development.

“CO₂ remains in the atmosphere for hundreds of years and in the oceans for even longer. There is currently no magic wand to remove all the excess CO₂ from the atmosphere,” said WMO Deputy Secretary-General Elena Manaenkova.

“Every fraction of a degree of global warming matters, and so does every part per million of greenhouse gases,” she said.

Together, the reports provide a scientific base for decision-making at the UN climate change negotiations, which will be held from 2-14 December in Katowice, Poland. The key objective of the meeting is to adopt the implementation guidelines of the Paris Climate Change Agreement, which aims to hold the global average temperature increase to as close as possible to 1.5°C.

“The new IPCC Special Report on Global Warming of 1.5°C shows that deep and rapid reductions of emissions of carbon dioxide and other greenhouse gases will be needed in all sectors of society and the economy. The WMO Greenhouse Gas Bulletin, showing a continuing rising trend in concentrations of greenhouse gases, underlines just how urgent these emissions reductions are,” said IPCC Chair Hoesung Lee.

Integrated Global Greenhouse Gas Information System

The Greenhouse Gas Bulletin is based on observations from the WMO Global Atmosphere Watch Programme, which tracks the changing levels of greenhouse gases as a result of industrialization, energy use from fossil fuel sources, intensified agricultural practices, increases in land use and deforestation. Globally averages presented in the Bulletin are representative for the global atmosphere.

The urgency of actions to reduce greenhouse gas emissions requires more tools at national and sub-national level to support stakeholders in taking effective and efficient actions.

Recognizing this need, WMO has initiated the development of observational based tools that can guide the emissions reduction actions and confirm their results, for instance in the oil and gas sector.

A new Integrated Global Greenhouse Gas Information System (IG3IS) provides the framework for the development and standardization of the observational based tools. IG3IS is implemented by countries on a voluntary basis and will feed into the national emission reporting mechanism to the UN Framework on Climate Change and the annual Conference of the Parties.

Key Findings of the Greenhouse Gas Bulletin

Carbon dioxide

Carbon dioxide is the main long-lived greenhouse gas in the atmosphere. Concentrations reached 405.5 ppm in 2017, 146% of the pre-industrial era (before 1750). The increase in CO₂ from 2016 to 2017 was about the same as the average growth rate over the last decade. It was smaller than the record leap observed from 2015 to 2016 under the influence of a strong El Niño event, which triggered droughts in tropical regions and reduced the capacity of “sinks” like forests and vegetation to absorb CO₂.  There was no El Niño in 2017.

Methane

Methane (CH₄) is the second most important long-lived greenhouse gas and contributes about 17% of radiative forcing. Approximately 40% of methane is emitted into the atmosphere by natural sources (e.g., wetlands and termites), and about 60% comes from human activities like cattle breeding, rice agriculture, fossil fuel exploitation, landfills and biomass burning.

Atmospheric methane reached a new high of about 1859 parts per billion (ppb) in 2017 and is now 257% of the pre-industrial level. Its rate of increase was about equal that observed over the past decade.

Nitrous Oxide

Nitrous oxide (N₂O) is emitted into the atmosphere from both natural (about 60%) and anthropogenic sources (approximately 40%), including oceans, soil, biomass burning, fertilizer use, and various industrial processes.

Its atmospheric concentration in 2017 was 329.9 parts per billion. This is 122% of pre-industrial levels. It also plays an important role in the destruction of the stratospheric ozone layer which protects us from the harmful ultraviolet rays of the sun. It accounts for about 6% of radiative forcing by long-lived greenhouse gases.

CFC-11

The Bulletin has a special section devoted to CFC-11 (trichlorofluoromethane). This is a potent greenhouse gas and a stratospheric ozone depleting substance regulated under the Montreal Protocol. Since 2012 its rate of decline has slowed to roughly two thirds of its rate of decline during the preceding decade. The most likely cause of this slowing is increased emissions associated with production of CFC-11 in eastern Asia.

This discovery illustrates the importance of long-term measurements of atmospheric composition, such as are carried out by the Global Atmosphere Watch Programme, in providing observation-based information to support national emissions inventories and to support agreements to address anthropogenic climate change, as well as for the recovery of the stratospheric ozone layer.

Notes for Editors

The WMO Global Atmosphere Watch Programme coordinates systematic observations and analysis of greenhouse gases and other trace species. Fifty three countries contributed data for the Greenhouse Gas Bulletin. Measurement data are reported by participating countries and archived and distributed by the World Data Centre for Greenhouse Gases (WDCGG) at the Japan Meteorological Agency.