@techreport{fdi:010085050,
  title = {{R}ecent significant decline of strong carbon peat accumulation rates in tropical {A}ndes related to climate change and glacier retreat [preprint]},
  author = {{L}lanos, {R}omina and {M}oreira-{T}urcq, {P}atricia and {T}urcq, {B}runo and {E}spinoza {V}illar, {R}aúl and {H}uaman, {Y}izet and {C}ondom, {T}homas and {W}illems, {B}ram},
  editor = {},
  language = {{ENG}},
  abstract = {{C}limate change has altered precipitation and temperature patterns in the tropical {A}ndes. {A}s a result, tropical glaciers have retreated significantly over the past 50 years and have even disappeared in some areas. {A}ndean peatlands, one of the most important {A}ndean carbon reservoirs, also seem to be affected by these climate changes, since glaciers have been recognized as one of their vital water sources. {H}ere, we point out the important role of {A}ndean peatlands on carbon accumulation rates ({CAR}), one of the highest in the world, and the impact of climate on carbon storage over the last 65 years, using four peat cores. {T}he peat cores were radiocarbon-dated and ages were post-bomb calibrated and chronological models indicated basal ages (30 cm depth) ranging from 1957 to 1972 {CE}, where accumulation rates reached up 1.7 cm yr?1. {F}or both peatlands, carbon accumulation rates are high (mean of 470 and 220 g {C} m?2 yr?1 at {APA} 1 and {APA} 2 sites, respectively) and can reach up to 1010 g {C} m?2 yr?1. {D}istichia muscoides is the dominant species in the {P}eruvian {C}entral {A}ndes peatlands and the high {CAR}, among other factors, is a characteristic of this species. {O}ur results point out that a marked decrease of {CAR} after the early 1980s at both peatlands is likely related to an increase in annual temperature, which is responsible for the retreat of glaciers. {W}e use a new high-resolution proxy ({S}krzypek et al., 2011) based on the ?13{C} of {D}istichia along the cores to evaluate the temperature variability at the site. {W}e observed a general trend of increase in the reconstructed temperature from both studied peatlands from 1.9 to 2 º{C} for the period 1970-2015 {CE}. {C}omparison with air temperature data from the {NCEP}-{NCAR} reanalysis for the higher resolution cores shows a good relationship and an increase of 2.15 °{C} for the same period. {T}emperature increase may directly affect {CAR} by an increase in organic matter degradation rates. {T}he decrease in {CAR} during the period of study may also be due to a decrease in melt water inflow generated by the retreat of glaciers that have almost disappeared today in the catchments as a consequence of regional warming. {O}ur findings emphasize that marked changes in carbon accumulation rates demonstrate the high ecological sensitivity of tropical high-{A}ndean peatlands, endangering their outstanding role in the regional (and even global) {C} cycle as large {C} sinks that contribute to the mitigation of global climate change.},
  keywords = {{PEROU} ; {ANDES}},
  address = {},
  series = {},
  pages = {bg-2022-47 [19 ]},
  year = {2022},
  DOI = {10.5194/bg-2022-47},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085050},
}