wur_mumm_campaign_2021

Vertical Profiles of NO2 over the North Sea in summer 2021 as measured by an aircraft and co-sampled from TM5.

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General

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• Author(s): T. Christoph V. W. Riess, Jasper van Vliet, Ward Van Roy, Jos de Laat, Enrico Dammers, and K.Folkert Boersma
• Contact: [email protected]

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Title

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Aircraft and TM5 NO2 profiles underlying publication "doi"

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Methods

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Introduction

Aicraft measured vertical profiles of NO2 over the North Sea during summer 2021, as well as coinciding TM5 profiles.

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FolderStructure

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There is only one parent directory present containing all files.

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FolderContents

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• parent_folder/

"{profilenumber}".csv -One .csv-file for each of the vertical profiles.

mean_profile.csv -This is the mean of the campaign, representing a summerday North Sea profile over a busy ship track

TM5_"{profilenumber}".csv - One .csv file for each TM5 profile coinciding with the measured profiles

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FileFormats

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The "{profilenumber}".csv -files for the single profiles have the following columns:

"profile": name of the profile

"mid_layer_altitude [m]": center altitude of the layer in meters

"Lat": mean latitude (in Degreees North)

"Lon": mean longitude (in degrees East)

"NO2 [molec/m^3]": mean corrected number density of NO2 in the layer (in molec/m^3). if multiplied with layer thickness (50m), this yields the sub-columns

"w_n [m/s]": mean northward wind in the layer (in m/s)

"w_e [m/s]": mean eastward wind in the layer (in m/s)

"start [UTC]": starting time of the profile flight (dd.mm.yyyy hh:mm:ss in UTC)

"end [UTC]": end time of the profile flights (dd.mm.yyyy hh:mm:ss in UTC)

The mean_profile.csv has the following columns:

"profile": name of the profile

"mid_layer_altitude [m]": center altitude of the layer in meters

"NO2 [molec/m^3]": mean corrected number density of NO2 in the layer (in molec/m^3) of all ten profiles. if multiplied with layer thickness (50m), this yields the sub-columns

"NO2_sem [molec/m^3]": standard error of NO2 in the layer (in molec/m^3) of all ten profiles

The TM5_"{profilenumber}".csv have the following format:

Alt_int: Altitude of the upper layer interface in [m]. Calculated from the TM5 pressure levels using ERA pressure profiles.

Alt_mid: Altitude of the middle of the layer in [m]. Calculated from the TM5 pressure levels using ERA pressure profiles.

NO2: TM5 NO2 in [molec/m^3] for the given layer. Calculated as the distance weighted mean from TM5 files at https://scihub.copernicus.eu

p: mid-level pressure of the layer and using ERA5 to translete from mixing ratio

NO2_mr: NO2 as mixing ratio for each layer

AK: Averaging Kernel for each layer as provided in the TM5 files

AK_trop: tropospheric Averaging Kernel for each layer as provided in the TM5 files

T: temperature of each layer from ERA5 data

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