@article{fdi:010081047, title = {{R}etrieval of {M}etop-{A}/{IASI} {N}2{O} profiles and validation with {NDACC} {FTIR} data}, author = {{B}arret, {B}. and {G}ouzenes, {Y}. and {L}e {F}lochmoen, {E}. and {F}errant, {S}ylvain}, editor = {}, language = {{ENG}}, abstract = {{T}his paper reports atmospheric profiles of {N}2{O} retrieved from {M}etop/{IASI} with the {S}oftware for the {R}etrieval of {IASI} {D}ata ({SOFRID}) for the 2008-2018 period and their validation with {FTIR} data from 12 stations of the {N}etwork for the {D}etection of {A}tmospheric {C}omposition {C}hanges ({NDACC}). {SOFRID} retrievals performed in the 2160-2218 cm(-1) spectral window provide 3 independent pieces of information about the vertical profile of {N}2{O}. {T}he {FTIR} versus {SOFRID} comparisons display a better agreement in the mid-troposphere ({MT}, 700-350 h{P}a) than in the lower ({LT}, {S}urface-700 h{P}a) and upper ({UT}, 350-110 h{P}a) troposphere with correlation coefficients ({R}) in the 0.49-0.83 range and comparable variabilities (3-5 ppbv). {T}he agreement for oceanic and coastal stations ({R} > 0.77) is better than for continental ones ({R} < 0.72). {T}he {SOFRID} {MT} {N}2{O} mixing ratios are significantly biased high (up to 16.8 ppbv) relative to {FTIR} at continental stations while the biases remain below 4.2 ppbv and mostly unsignificant when oceanic data are considered. {T}he average {MT} decadal trends derived from {SOFRID} at the 8 {NDACC} stations with continuous observations during the 2008-2018 period (1.05 +/- 0.1 ppbvyr(-1)) is in good agreement with the corresponding {FTIR} trends (1.08 +/- 0.1 ppbvyr(-1)) and the {NOAA}-{ESRL} trends from surface in-situ measurements (0.95 +/- 0.02 ppbvyr(-1)). {I}n the {N}orthern {H}emisphere where they are clearly detected, the {N}2{O} {MT} seasonal variations from {SOFRID} and {FTIR} are phased (summer minima) and have similar amplitudes. {SOFRID} also detects the {UT} summer maxima indicating independent {MT} and {UT} information. {T}he global {MT} {N}2{O} oceanic distributions from {SOFRID} display low geographical variability and are mainly characterized by enhanced tropical mixing ratios relative to mid and high latitudes.}, keywords = {{N}itrous {O}xide ({N}2{O}) ; {IASI} ; remote sensing ; greenhouse gases ; tropospheric composition}, booktitle = {}, journal = {{A}tmosphere}, volume = {12}, numero = {2}, pages = {219 [26 p.]}, year = {2021}, DOI = {10.3390/atmos12020219}, URL = {https://www.documentation.ird.fr/hor/fdi:010081047}, }