Ladakh: diverse, high-altitude extreme environments for off-earth analogue and astrobiology research

Siddharth Pandey*, Jonathan Clarke, Preeti Nema, Rosalba Bonaccorsi, Sanjoy Som, Mukund Sharma, Binita Phartiyal, Sudha Rajamani, Rakesh Mogul, Javier Martin-Torres, Parag Vaishampayan, Jennifer Blank, Luke Steller, Anushree Srivastava, Randheer Singh, Savannah McGuirk, María-Paz Zorzano, Johannes Milan Güttler, Teresa Mendaza, Alvaro Soria-SalinasShamim Ahmad, Arif Ansari, Veeru Kant Singh, Chaitanya Mungi, Niraja Bapat

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper highlights unique sites in Ladakh, India, investigated during our 2016 multidisciplinary pathfinding expedition to the region. We summarize our scientific findings and the site's potential to support science exploration, testing of new technologies and science protocols within the framework of astrobiology research. Ladakh has several accessible, diverse, pristine and extreme environments at very high altitudes (3000–5700 m above sea level). These sites include glacial passes, sand dunes, hot springs and saline lake shorelines with periglacial features. We report geological observations and environmental characteristics (of astrobiological significance) along with the development of regolith-landform maps for cold high passes. The effects of the diurnal water cycle on salt deliquescence were studied using the ExoMars Mission instrument mockup: HabitAbility: Brines, Irradiance and Temperature (HABIT). It recorded the existence of an interaction between the diurnal water cycle in the atmosphere and salts in the soil (which can serve as habitable liquid water reservoirs). Life detection assays were also tested to establish the best protocols for biomass measurements in brines, periglacial ice-mud and permafrost melt water environments in the Tso-Kar region. This campaign helped confirm the relevance of clays and brines as interest targets of research on Mars for biomarker preservation and life detection.
Original languageEnglish
Pages (from-to)78-98
Number of pages21
JournalInternational Journal of Astrobiology
Volume19
Issue number1
Early online date13 Jun 2019
DOIs
Publication statusPublished - Feb 2020

Keywords

  • analogue
  • astrobiology
  • high-elevation
  • hot-springs
  • India
  • Ladakh
  • permafrost

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    Pandey, S., Clarke, J., Nema, P., Bonaccorsi, R., Som, S., Sharma, M., Phartiyal, B., Rajamani, S., Mogul, R., Martin-Torres, J., Vaishampayan, P., Blank, J., Steller, L., Srivastava, A., Singh, R., McGuirk, S., Zorzano, M-P., Güttler, J. M., Mendaza, T., ... Bapat, N. (2020). Ladakh: diverse, high-altitude extreme environments for off-earth analogue and astrobiology research. International Journal of Astrobiology, 19(1), 78-98. https://doi.org/10.1017/S1473550419000119