Citation:

PANGAEA.848595

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Project(s):

Surface Ocean Processes in the Anthropocene (SOPRAN)

Coverage:

Median Latitude: -1.272051 * Median Longitude: -6.679797 * South-bound Latitude: -5.030000 * West-bound Longitude: -15.000000 * North-bound Latitude: 2.000000 * East-bound Longitude: 1.710000

Date/Time Start: 2011-07-01T07:37:00 * Date/Time End: 2011-07-18T17:37:00

Minimum ALTITUDE: 12 m * Maximum ALTITUDE: 12 m

Event(s):

MSM18/3-track * Latitude Start: 16.886100 * Longitude Start: -24.997600 * Latitude End: 0.398500 * Longitude End: 9.436100 * Date/Time Start: 2011-06-22T00:00:00 * Date/Time End: 2011-07-21T00:00:00 * Campaign: * Basis: * Method/Device: Underway cruise track measurements (CT) * Comment: Mindelo - Libreville

Comment:

MAX-DOAS measurements were performed during the cruise leg MSM 18/3 using the same MAX-DOAS instrument as during TransBrom described in Grossmann et al 2013 (doi:10.5194/acp-13-3363-2013). Except for the use of an updated water vapour cross-section (HITEMP) and the correction for vibrational Raman scattering in air (Lampel et al 2015, doi:10.5194/amtd-8-5895-2015), the fit settings also agree with Grossmann et al 2013 (doi:10.5194/acp-13-3363-2013). Aerosol profiles were retrieved using the O4 absorption at 360 nm using an optimal estimation scheme described in Yilmaz 2013 (http://archiv.ub.uni-heidelberg.de/volltextserver/13128/) and Frieß et al 2006 (doi: 10.1029/2005JD006618) based on SCIATRAN (Rozanov et al 2010, doi:10.1016/j.asr.2005.03.012). These aerosol profiles were used as input parameter to calculate IO concentration profiles during the cruise leg MSM18/3. Here the surface volume mixing ratios are shown.

Upper Limits were determined for the following species, which were not detected in significant amounts during the cruise:

BrO: 2.2e13 molec/cm**2 at a telescope elevation angle of 3°, which corresponds to an average surface volume mixing of 1.5±0.5 ppt. The spectral settings for the BrO retrieval, which were applied here are in agreement with Pinardi et al 2013 (doi:10.5194/amt-6-167-2013).

Glyoxal: 5e14 molec/cm**2 at a telescope elevation angle of 3°, which corresponds to an average surface volume mixing of 25±10 ppt. The fit range was 432-460 nm and otherwise agreed with the spectral analysis of Glyoxal during Polarstern ANT28 listed in Mahajan et al 2014 (doi:10.1002/2013JD021388).

Formaldehyde mixing ratios can be processed on request. The spectral data of the measurements is stored on the measurement data server of the Institute for Environmental Physics, University of Heidelberg.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	DATE/TIME	Date/Time		Lampel, Johannes	Geocode
2	LATITUDE	Latitude		Lampel, Johannes	Geocode
3	LONGITUDE	Longitude		Lampel, Johannes	Geocode
4	ALTITUDE	Altitude	m	Lampel, Johannes	Geocode
5	Iodine monoxide volume mixing ratios	IO mix ratio	pmol/mol	Lampel, Johannes
6	Iodine monoxide volume mixing ratios, error	IO mix ratio e	pmol/mol	Lampel, Johannes
7	Iodine monoxide, vertical column density	IO VCD	molec/cm²	Lampel, Johannes
8	Iodine monoxide, vertical column density, error	IO VCD e	molec/cm²	Lampel, Johannes

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

2564 data points

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