@article{fdi:010091319,
  title = {{W}arming-induced cryosphere changes predict drier {A}ndean eco-regions},
  author = {{A}l-{Y}aari, {A}men and {C}ondom, {T}homas and {A}nthelme, {F}abien and {C}auvy-{F}rauni{\'e}, {S}. and {D}angles, {O}livier and {J}unquas, {C}l{\'e}mentine and {M}oret, {P}. and {R}abatel, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}limate change impacts on humans and ecosystems depend on the intensity, timing, and spatial variability of these changes. {W}hile considerable attention has been paid to current and future changes in temperature patterns, comparatively less attention has been devoted to water availability for humans and ecosystems. {T}he aridity index ({AI}), the ratio of precipitation to potential evapotranspiration, is a common metric used to assess water availability within ecosystems. {H}owever, the role of snow in {AI} calculations within snowy eco-regions is often neglected, resulting in an incomplete understanding of water balance dynamics in these environments. {I}n this study, we estimate aridification under ongoing climate change in {A}ndean eco-regions ({AE}s), focusing on two horizons: 2050-2060 and 2090-2100. {U}sing monthly {T}erra{C}limate data from 2013-2018, we calculated a mean {AI} for each {AE}, taking into account the absence of snow (pixels with a snow water equivalent ({SWE}) < 10 mm/month) and its presence ({AI}-snow; pixels with a {SWE} > 10 mm/month). {W}e show that {AI} allows to differentiate the eco-regions, but that the incorporation of snow in the {AI} calculation highlights the heterogeneity of aridity conditions within some eco-regions with energy-limited regimes ({AI} > 1) in the snowy zones and water-limited regimes ({AI} < 1) elsewhere. {A}nalysis of the {CORDEX}-{SAM} regional projections for the periods 2050-2060 and 2090-2100 indicates a general shift towards drier conditions prevailing over wetter conditions in most eco-regions, notably: the {S}outhern {A}ndean {S}teppe, the {C}entral {A}ndean {W}et {P}una, the {S}anta {M}arta {P} & aacute;ramo, and the {P}eruvian {Y}ungas. {T}he projected reduction in snowfall in {CORDEX}-{SAM}, coupled with glacier volume loss, appears to be contributing to the prevalence of aridification across many {AE}s. {T}hese findings highlight potential transitions towards aridification in diverse eco-regions, with repercussions on water availability for humans and ecosystems.},
  keywords = {aridity index ; snow ; {A}ndean eco-regions ; {COLOMBIE} ; {BOLIVIE} ; {PEROU} ; {EQUATEUR} ; {CHILI} ; {ARGENTINE} ; {ANDES}},
  booktitle = {},
  journal = {{E}nvironmental {R}esearch {L}etters},
  volume = {19},
  numero = {10},
  pages = {104030 [15 ]},
  ISSN = {1748-9326},
  year = {2024},
  DOI = {10.1088/1748-9326/ad6ea6},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091319},
}