Continuous data from the German Ultrafine Aerosol Network (GUAN)

From TROPOS Wiki

Jump to: navigation, search

Contents

Introduction

The German Ultrafine Aerosol Network (GUAN) is a cooperative atmospheric observation network that adresses climate-related effects, and human particle exposure.

GUAN data are stored at EBAS, a data repository hosted by the Global Atmosphere Watch World Data Centre of Aerosols. EBAS is operated by the Norwegian Institute for Air Research (NILU).

Data format

The download links on this page refer to Level-2 data (quality controlled, hourly time resolution, normalised to 0°C and 1013 hPa). Level-0 data (instrumental raw data) and Level-1 data (processed data at original time resolution and operational conditions) can be obtained on request from EBAS. All data are stored in EBAS NASA-Ames format.

Download instructions

We ask you to carefully read the text found in the data disclaimer data disclaimer and in EBAS' "info" pages associated to the filter criteria. Having agreed to the EBAS data sharing policy, you will be able to navigate directly to the data sets through clickable links in the Tables below.

ONLINE - data set complete ONLINE - data set not yet complete Under verification at EBAS Stored at the data originator (transfer to EBAS intended) no data collection

Particle number size distributions

In GUAN, particle number size distributions are measured in a "dry state", i.e. at low relative humidity. Technical measures ensure that the relative humidity inside the instrument's sheath air will not exceed 50% (Wiedensohler et al., 2012). Dry measurements ensure that particle number concentrations from different sites and from different seasons remain comparable. The actual values of relative humidity and temperature in every instrument are stored at EBAS and can be accessed through the data base interface there.

Click here to view the data capture statistics.

No. Site name EBAS code Type All 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 ... former data
1 Annaberg-Buchholz DE0061B urban background All 2016 2015 2014 2013 2012
2 Augsburg DE0062B urban background All
3 Bösel (Südoldenburg) DE0056R rural All 2014 2013 2012 2011 2010
4 Dresden-Nord DE0063K roadside All 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002
5 Dresden-Winckelmannstrasse DE0064B urban background All 2016 2015 2014 2013 2012 2011 2010
6 Hohenpeissenberg DE0043G rural (mountain) All 2016 2015 2014 2013 2012 2011 2010 2009 1998-20001
7 Langen DE0065B urban background All
8 Leipzig-Eisenbahnstrasse DE0066K roadside All 2016 2015 2014 2013 2012 2011
9 Leipzig-Mitte DE0067K roadside All 2015 2014 2013 2012 2011 2010
10 Leipzig-Tropos ("Leipzig") DE0055B urban background All 2016 2015 2014 2013 2012 2011 2010
11 Leipzig-West DE0068B urban background All 2015 2014 2013 2012 2011 2010
12 Melpitz DE0044R rural All 2016 2015 2014 2013 2012 2011 2010 2009 20081 20071 20061 20051 20041 20031 1996-19971
13 Mülheim-Styrum DE0069B urban background All
14 Neuglobsow DE0007R rural All 2016 2015 2014 2013 2012 2011
15 Schauinsland DE0003R rural (mountain) All 2016 2015 2014 2013 2012 2011 2010 2009 20081 20071 20061 20051
16 Waldhof DE0002R rural All 2016 2015 2014 2013 2012 2011 2010 2009
17 Zugspitze (Schneefernerhaus) DE0054R Alpine mountain All 2016 2015 2014 2013 2012 2011 2010 2009 20081 20071 20061 20051 20041

1These data sets were processed under former data processing standards. These data lack, particularly, the corrections for the losses in the internal tubing of the mobility particle size spectrometers, which are mostly relevant for particle diameters below 30 nm. With time, these data sets will be updated.

Non-volatile particle number size distributions (T = 300°C)

Non-volatile particle number size distributions are measured downstream of a thermodenuder, operated at 300°C, which strips off non-volatile particulate compounds (Birmili et al., 2010; Poulain et al., 2014)

No. Site name EBAS code Type All 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009
2 Augsburg DE0062B urban background All
3 Bösel (Südoldenburg) DE0056R rural All 2013 2012 2011 2010
6 Hohenpeissenberg DE0043G rural (mountain) All 2016 2015 2014 2013 2012 2011 2010
8 Leipzig-Eisenbahnstrasse DE0066K roadside All
10 Leipzig-Tropos ("Leipzig") DE0055B urban background All 2015 2014 2013 2012 2011 2010
12 Melpitz DE0044R rural All 2011 2010 2009
15 Schauinsland DE0003R rural (mountain) All 2016 2015 2014 2013 2012 2011 2010 2009
17 Zugspitze (Schneefernerhaus) DE0054R Alpine mountain All 2016 2015 2014 2013 2012 2011

Aerosol absorption coefficient (Equivalent Black Carbon)

The aerosol absorption coefficient is usually indicated in Mm-1. To obtain equivalent black carbon (eBC) mass concentrations in µg/m3, these numbers are divided by a mass absorption cross section of 6.6 m2/g.

Click here to view the data capture statistics.

No. Site name EBAS code Type Matrix1 All 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004
1 Annaberg-Buchholz DE0061B urban background PM1 All 2013 2012
2 Augsburg DE0062B urban background PM2.5 All
3 Bösel (Südoldenburg) DE0056R rural PM10 All 2014 2013 2012 2011 2010 2009
4 Dresden-Nord DE0063K roadside PM1 All
5 Dresden-Winckelmannstrasse DE0064B urban background PM1 All
6 Hohenpeissenberg DE0043G rural (mountain) PM10 All 2011 2010 2009 2008
8 Leipzig-Eisenbahnstrasse DE0066K roadside PM1 All 2016 2015 2014 2013 2012 2011 2010 2009
9 Leipzig-Mitte DE0067K roadside PM10 All 2016 2015 2014 2013 2012 2011
10 Leipzig-Tropos ("Leipzig") DE0055B urban background PM10 All 2016 2015 2014 2013 2012 2011 2010 2009
11 Leipzig-West DE0068B urban background PM10 All 2016 2015 2014 2013 2012 2011 2010
12 Melpitz DE0044R rural PM10 All 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007
14 Neuglobsow DE0007R rural PM10 All 2016 2015
15 Schauinsland DE0003R rural (mountain) PM10 All 2016 2015 2014 2013 2012 2011 2010 2009
16 Waldhof DE0002R rural PM10 All 2016 2015 2014 2013 2012 2011
17 Zugspitze (Schneefernerhaus) DE0054R Alpine mountain TSP All 2016 2015 2014 2013 2012 2011 2010 2009

1Matrix indicates the regime (cut-off diameter) of the inlet used for the eBC measurement at a particular site.

Aerosol absorption coefficient (eBC) correction

Unfortunately, not all aerosol absorption measurements in GUAN use the same inlet configuration. Inlets for PM10, PM2.5 and PM1 are used throughout the network (see Table above). In order to harmonise the absorption (and also eBC) values, the data recorded downstream of the PM1 cyclone inlets may be adjusted to the corresponding level of a PM10 inlet by a multiplication factor of 1.10 for rural sites, 1.08 for urban background sites, and 1.05 for roadside sites. For details, see Birmili et al. (2016) below.

Scientific reference paper

  • Birmili, W., Weinhold, K., Rasch, F., Sonntag, A., Sun, J., Merkel, M., Wiedensohler, A., Bastian, S., Schladitz, A., Löschau, G., Cyrys, J., Pitz, M., Gu, J., Kusch, T., Flentje, H., Quass, U., Kaminski, H., Kuhlbusch, T. A. J., Meinhardt, F., Schwerin, A., Bath, O., Ries, L., Gerwig, H., Wirtz, K., and Fiebig, M.: Long-term observations of tropospheric particle number size distributions and equivalent black carbon mass concentrations in the German Ultrafine Aerosol Network (GUAN), Earth Syst. Sci. Data, 8, 355-382, doi:10.5194/essd-8-355-2016, 2016. Download at ESSD

Technical references

Parameter Instrument Main technical references
Particle number size distribution Mobility particle size spectrometer Wiedensohler et al. (2012); Pfeifer et al. (2014)
Non-volatile particle number size distribution Mobility particle size spectrometer-Thermodenuder Wehner et al. (2002); Birmili et al. (2010); Poulain et al. (2014)
Aerosol absorption coefficient MAAP Petzold and Schönlinner (2004)
  • Petzold, A. and Schönlinner, M.: Multi-Angle Absorption Photometry - a new method for the measurement of aerosol light absorption and atmospheric black carbon. J. Aerosol Sci., 35, 421-441, 2002.
  • Wehner, B., S. Philippin, and A. Wiedensohler, Design and calibration of an improved thermodenuder to study the volatility fraction of aerosol particles, J. Aerosol Sci., 33, 1087-1093, 2002.

Digital Object Identifier (DOI)

This landing page can be accessed by the digital object identifier https://doi.org/10.5072/guan.

Revision date

Last update: 2018-01-04. © 2018 TROPOS. All rights reserved.

Contact

Wolfram Birmili, on behalf of the GUAN consortium.

Email address: wolfram.birmili(at)uba.de

Navigation

Click here to return to the German Ultrafine Aerosol Network Main Page.

Personal tools
Create a book