Left Menu
Development News Edition

Himalayan geothermal springs show discharge of CO2 rich water

Himalaya hosts about 600 geothermal springs having varied temperature and chemical conditions.

Devdiscourse News Desk | New Delhi | Updated: 10-08-2020 13:59 IST | Created: 10-08-2020 13:59 IST
Himalayan geothermal springs show discharge of CO2 rich water
The team of scientists carried out detailed chemical and stable isotope analysis of water samples collected from 20 geothermal springs from major fault zones of Garhwal Himalaya. Image Credit: Pixabay

Carbon outflux from Earth's interior to the exosphere through volcanic eruptions, fault zones, and geothermal systems contribute to the global carbon cycle that effects short and long term climate of the Earth. Himalaya hosts about 600 geothermal springs having varied temperature and chemical conditions. Their role in regional and global climate, as well as the process of tectonic driven gas emission, needs to be considered while estimating emissions to the carbon cycle and thereby to global warming.

The Himalayan geothermal springs which cover about 10,000 square km in the Garhwal region of Himalaya show a significant discharge of Carbon dioxide(CO2) rich water. This was found by Wadia Institute of Himalayan Geology, an autonomous institute under the Department of Science & Technology, Govt. of India, which investigated and characterised the gas emissions from these springs. The estimated carbon dioxide degassing (removal of dissolved gases from liquids, especially water or aqueous solutions) flux is nearly 7.2 ×106 mol/year to the atmosphere.

The study published in the scientific journal Environmental Science and Pollution Research suggested that CO2 in these thermal springs are sourced from metamorphic decarbonation of carbonate rocks present deep in the Himalayan core along with magmatism and oxidation of graphite. Most of the geothermal water is dominated by evaporation followed by weathering of silicate rocks. Isotopic analyses further point towards a meteoric source for geothermal water.

The team of scientists carried out detailed chemical and stable isotope analysis of water samples collected from 20 geothermal springs from major fault zones of Garhwal Himalaya. Isotopic measurements (identification of the abundance of certain stable isotopes and chemical elements within organic and inorganic compounds) such as Dissolved Inorganic Carbon (δ13CDIC ), and Oxygen (δ18O) along with major ions were analysed for all the samples.

They found that the geothermal spring water contains high Dissolved Inorganic Carbon δ13CDIC ratio (− 8.5‰to + 4.0‰VPDB), and among the major ions, bicarbonate (HCO3−) varied between 1697 to 21,553 μEq/L; chloride and sodium ranged between 90 to 19,171 μEq/L and 436 to 23181 μEq/L. A high concentration of Cl− and Na+ in geothermal spring waters indicated its deeper source.

Simulation studies done by the WIHG team suggest that these geothermal springs have the potential to degas~7.2 × 106 mol of CO2 per year to the atmosphere. Estimated flux from this study is comparable to release of CO2 during the uplift of the Himalaya (~1011 mol/year) and

sub-aerial volcanism (1012 mol/year) in the atmosphere. Such CO2 degassing should be taken into account to assess global carbon outflux in the earth's atmosphere.

(With Inputs from PIB)



Post-COVID-19 Nigeria needs a robust Health Management Information System to handle high disease burden

Nigeria is among a few countries that conceptualised a health management information system HMIS in the early 90s but implementation has been a challenge till date. Besides COVID-19, the country has a huge burden of communicable and non-com...

Morocco COVID-19 response: A fragile health system and the deteriorating situation

Learning from its European neighbors, Morocco imposed drastic measures from the initial stages of the COVID-19 outbreak to try to contain its spread. The strategy worked for a few months but the cases have surged after mid-June. In this sit...

COVID-19: Argentina’s health system inefficiencies exaggerate flaws of health information system

You can recover from a drop in the GDP, but you cant recover from death, was the straightforward mindset of Argentinas President Alberto Fernndez and defined the countrys response to COVID-19. The South American nation imposed a strict...

Rwanda’s COVID-19 response commendable but health information system needs improvement

Rwanda is consistently working to improve its health information system from many years. However, it is primarily dependent on the collection and reporting of health data on a monthly basis. Besides, evaluation studies on Rwandas HIS publis...


Latest News

Turkey, Greece agree to resume talks after four years

Turkey and Greece have agreed to resume talks over their contested maritime claims in the eastern Mediterranean after a four year hiatus following weeks of tensions that culminated in a collision between their warships. The talks, which bro...

BLM gets first mention at UN's virtual gathering

South African President Cyril Ramaphosa is the first world leader at the United Nations annual gathering to mention the Black Lives Matter movement. As a country that has known too well the anguish of institutional racism, South Africa supp...

LS passes three labour codes; Gangwar says reforms to boost investment, widen social security net under ESIC, EPFO

Lok Sabha on Tuesday passed three labour code legislations which envisage covering over 50 crore workers from organized, unorganized and self-employed categories for minimum wages and social security. The Occupational Safety, Health and Wor...

Polish town votes to stay 'LGBT-free zone' despite global criticism

Councillors in eastern Poland voted narrowly on Tuesday to keep a motion declaring their town free from LGBT ideology, as international pressure grows on dozens of Polish municipalities that have made similar declarations. The mayors office...

Give Feedback