IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

IUP HeidelbergStatus of Ground-Based Network

Udo FrießInstitute of Environmental Physics

University of HeidelbergGermany

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Contents

• Status of the IUPHD Ground-Based Network

• Profile retrieval algorithm

• Selected Results

• Technical Issues: NORS Data format

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

The IUPHD MAX-DOAS Ground-Based Network

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

The IUPHD MAX-DOAS Ground-Based Network- Status -

• Alert, Canada: – Operated in collaboration with Environment Canada– Instrument installed in 2008– Various instrumental problems since then– Instrument shipped to Heidelberg for maintenance in Autumn 2011– Now continuously operational

• Hohenpeißenberg, Germany:– Operated in collaboration with German Weather Service (DWD)– New instrument operational since 2008– 2D scanner– Extended measurement geometry with direct sunlight and almucantar measurements since

March 2012– Unfortunately, our Diploma student abandoned...– DWD plans to employ a postdoc for the MAX-DOAS this year

• Zugspitze, Germany:– Operated in collaboration with DLR– MAX-DOAS measurements since January 2001– High altitude station (2650 m asl)

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

The IUPHD MAX-DOAS Ground-Based Network- Status -

• Cape Verde:– Measurements since 2006 with varying quality

• Suriname:– MAX-DOAS measurements since 2002– Improved entrance optics installed in 2009

• Neumayer Station, Antarctica:– Continuous operation since 1999– Initially zenith-sky only, MAX-DOAS telescope installed in 2005– Re-analysis of complete time series with current NDACC recommendations in progress

• Arrival Heights, Antarctica:– In cooperation with NIWA Lauder– Continuous MAX-DOAS measurements since 1998– Re-analysis of complete time series with current NDACC recommendations in progress

• Polarstern:– Permanently installed MAX-DOAS instrument– Currently operating without any problems (after maintenance in Autumn 2011)

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Aerosol and Trace Gas Profile Retrieval Algorithm- Selami Yilmaz -

• Aerosol and trace gas vertical profile inversion algorithms.

• Based on optimal estimation, with SCIATRAN (IUP Bremen) as forward model

• New version with user-friendly interface recently released

• Runs on IDL virtual machine

EUCAARI Campaign, Cabauw, 2008

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

OASIS-Barrow 2009, AlaskaAerosol Extinction from MAX-DOAS

- Comparison with ARM Ceilometer -

MAX

-D

OAS

Ceilo

met

erO

rigin

al(A

RM, 3

0 m

grid

)

Ceilo

met

erD

egra

ded

to M

AX-

DO

AS re

solu

tion

0.0

0.5

1.0

1.5

0.0

0.5

1.0

1.5

Alti

tud

e [km

]

0.01

0.1

1

10

1E+02

1E+03

1E+04

1E+05

20

.3

21

.3

22

.3

23

.3

24

.3

25

.3

26

.3

27

.3

28

.3

29

.3

30

.3

31

.3

1.4

2.4

3.4

4.4

5.4

6.4

7.4

8.4

9.4

10

.4

11

.4

12

.4

13

.4

14

.4

15

.4

0.0

0.5

1.0

1.5

Ba

cksc

att

er

[A.U

.]E

xtin

ctio

n

[km

-1]

Date 2009

1E-03

0.01

0.1

1

10

Frieß et al., JGR, 2011

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

OASIS-Barrow 2009, Alaska

Aerosol Optical Depth from MAX-DOAS- Comparison with ARM Sun Photometer-

3.4 4.4 5.4 6.4 7.4 8.4 9.4 10.4 11.4 12.4 13.4 14.4 15.4

0.1

1

10

AO

D

Date 2009

MAX-DOAS Sun photometer Sun photometer, quality filtered

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Barrow 2009 - Results

0102030400.00.51.01.5

Extin

ctio

n [

km

-1 ]

Altitud

e

[km

]

051015202530

BrO

VM

R [

pp

t]

Surf

.BrO

[ppt] LP, short

LP, long MAX-DOAS

12 Apr 13 Apr 14 Apr0.0

0.5

1.0

1.5

Altitud

e

[km

]

Date 2009

1E-03

0.01

0.1

1

10

0

5

10

15 Wind speed [m/s] Wind direction [deg] Temperature [°C]

0

90

180

270

360

-30

-20

-10

1

10

Surf

. ozone

[ppb

]

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Comparison of BrO measured by LP-DOAS and CIMS

(Chemical Ionisation Mass Spectrometry)

Liao, J.; Huey, L. G.; Neuman, J. A.; Tanner, D. J.; Sihler, H.; Frieß, U.; Platt, U.; Flocke, F. M.; Orlando, J. J.; Shepson, P. B.; Beine, H. J.; Weinheimer, A.; Sjostedt, S. J.; Nowak, J. B. & Knapp, D.:A comparison of Arctic BrO measurements by a chemical ionization mass spectrometer (CIMS) and a long path differential optical absorption spectrometer (LP-DOAS), submitted to J. Geophys. Res., 2010.

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Hohenpeißenberg, Germany

-10°200 m

90°

10°

20°

2°5°

1°

-2°

100 m

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Hohenpeißenberg, Germany

NO2 Profiles, 8.7.2010

NO2 Surface Mixing RatioComparison with in situ

Sabrina Niebling, Diploma Thesis

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Hohenpeißenberg, Germany

University of Heidelberg

NO2 Surface Mixing Ratio – Comparison with in situ measurements

Sabrina Niebling, Diploma Thesis

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Zugspitze, Germany (2650 m a.s.l.)

Combination of measurements at Hohenpeißenberg and Zugspitze would allow to estimate vertical profiles both in boundary layer and free troposphere.

University of Heidelberg

NO2 dSCDs (relative to current zenith sky measurement)

Moritz Jurgschat, Diploma Thesis

IUP Heidelberg – NDACC/NORS Meeting – July 3-4 2012

Polarstern Measurements

IO HCHO

Average and maximum values are plotted daily left and right of the cruise track. For ANT27/ARK25 only daily averages are shown.

Johannes Lampel & Katja Großmann