Final published version, 5.66 MB, PDF document
Final published version
Licence: CC BY
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Probing the subtropical lowermost stratosphere and the tropical upper troposphere and tropopause layer for inorganic bromine
AU - Werner, Bodo
AU - Stutz, Jochen
AU - Spolaor, Max
AU - Scalone, Lisa
AU - Raecke, Rasmus
AU - Festa, James
AU - Colosimo, Santo Fedele
AU - Cheung, Ross
AU - Tsai, Catalina
AU - Hossaini, Ryan
AU - Chipperfield, Martyn P.
AU - Taverna, Giorgio S.
AU - Feng, Wuhu
AU - Elkins, JamesW.
AU - Fahey, DavidW.
AU - Gao, Ru-Shan
AU - Hintsa, Erik J.
AU - Thornberry, Troy D.
AU - Moore, Free Lee
AU - Navarro, Maria A.
AU - Atlas, Elliot
AU - Daube, Bruce C.
AU - Pittman, Jasna
AU - Wofsy, Steve
AU - Pfeilsticker, Klaus
PY - 2017/1/25
Y1 - 2017/1/25
N2 - We report measurements of CH4 (measured in situ by the Harvard University Picarro Cavity Ringdown Spectrometer (HUPCRS) and NOAA Unmanned Aircraft System Chromatograph for Atmospheric Trace Species (UCATS) instruments), O-3 (measured in situ by the NOAA dual-beam ultraviolet (UV) photometer), NO2, BrO (remotely detected by spectroscopic UV-visible (UV-vis) limb observations; see the companion paper of Stutz et al., 2016), and of some key brominated source gases in whole-air samples of the Global Hawk Whole Air Sampler (GWAS) instrument within the subtropical lowermost stratosphere (LS) and the tropical upper troposphere (UT) and tropopause layer (TTL). The measurements were performed within the framework of the NASA-ATTREX (National Aeronautics and Space Administration - Airborne Tropical Tropopause Experiment) project from aboard the Global Hawk (GH) during six deployments over the eastern Pacific in early 2013. These measurements are compared with TOMCAT/SLIMCAT (Toulouse Off-line Model of Chemistry And Transport/Single Layer Isentropic Model of Chemistry And Transport) 3-D model simulations, aiming at improvements of our understanding of the bromine budget and photochemistry in the LS, UT, and TTL.Changes in local O-3 (and NO2 and BrO) due to transport processes are separated from photochemical processes in intercomparisons of measured and modeled CH4 and O-3. After excellent agreement is achieved among measured and simulated CH4 and O-3, measured and modeled [NO2] are found to closely agree with = 1790 ppb), [Br-y(inorg)] is found to increase from a mean of 2.63 +/- 1.04 ppt for potential temperatures (theta) in the range of 350-360K to 5.11 +/- 1.57 ppt for theta = 390 - 400K, whereas in the subtropical LS (i.e., when [CH4]
AB - We report measurements of CH4 (measured in situ by the Harvard University Picarro Cavity Ringdown Spectrometer (HUPCRS) and NOAA Unmanned Aircraft System Chromatograph for Atmospheric Trace Species (UCATS) instruments), O-3 (measured in situ by the NOAA dual-beam ultraviolet (UV) photometer), NO2, BrO (remotely detected by spectroscopic UV-visible (UV-vis) limb observations; see the companion paper of Stutz et al., 2016), and of some key brominated source gases in whole-air samples of the Global Hawk Whole Air Sampler (GWAS) instrument within the subtropical lowermost stratosphere (LS) and the tropical upper troposphere (UT) and tropopause layer (TTL). The measurements were performed within the framework of the NASA-ATTREX (National Aeronautics and Space Administration - Airborne Tropical Tropopause Experiment) project from aboard the Global Hawk (GH) during six deployments over the eastern Pacific in early 2013. These measurements are compared with TOMCAT/SLIMCAT (Toulouse Off-line Model of Chemistry And Transport/Single Layer Isentropic Model of Chemistry And Transport) 3-D model simulations, aiming at improvements of our understanding of the bromine budget and photochemistry in the LS, UT, and TTL.Changes in local O-3 (and NO2 and BrO) due to transport processes are separated from photochemical processes in intercomparisons of measured and modeled CH4 and O-3. After excellent agreement is achieved among measured and simulated CH4 and O-3, measured and modeled [NO2] are found to closely agree with = 1790 ppb), [Br-y(inorg)] is found to increase from a mean of 2.63 +/- 1.04 ppt for potential temperatures (theta) in the range of 350-360K to 5.11 +/- 1.57 ppt for theta = 390 - 400K, whereas in the subtropical LS (i.e., when [CH4]
KW - CHEMICAL-TRANSPORT MODEL
KW - SHORT-LIVED SUBSTANCES
KW - IN-SITU MEASUREMENTS
KW - ORGANIC-COMPOUNDS
KW - GAS-CHROMATOGRAPH
KW - LIMB MEASUREMENTS
KW - WESTERN PACIFIC
KW - SCIAMACHY LIMB
KW - CARBON-DIOXIDE
KW - METHYL-IODIDE
U2 - 10.5194/acp-17-1161-2017
DO - 10.5194/acp-17-1161-2017
M3 - Journal article
VL - 17
SP - 1161
EP - 1186
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
SN - 1680-7316
IS - 2
ER -