Ms. Veronika Wolf Profile

Veronika Wolf

at Deutscher Wetterdienst

SPIE Involvement:

Author

Publications (2)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 20 October 2014 Paper

New lidar facility at Lindenberg Meteorological Observatory, Germany

J. Reichardt, R. Begbie, V. Wolf, Andrew Reigert, U. Wandinger, R. Engelmann, B. Hilber

Proceedings Volume 9246, 92460E (2014) https://doi.org/10.1117/12.2067219

KEYWORDS: LIDAR, Spectroscopy, Receivers, Environmental sensing, Aerosols, Observatories, Atmospheric particles, Raman spectroscopy, Clouds, Atmospheric sensing

Read Abstract +

Since 2005, the high-performance multiparameter Raman lidar RAMSES (Raman lidar for atmospheric moisture sensing) for water vapor, temperature, cloud and aerosol measurements is part of the broad suite of active and passive remote-sensing instruments monitoring the atmosphere at the German Meteorological Services observatory in Lindenberg. Initially housed in a 20-foot container, continued expansion of RAMSES made accommodation of the instrument increasingly difficult, and caused problems in air-conditioning. For these reasons, a new lidar facility was built on site in 2013. It is now home to RAMSES, and it also provides extra laboratory space for (lidar) experiments. The Lindenberg lidar facility is described in detail. One of its features is the precision air-conditioning system which is designed to keep the temperature field of the RAMSES room stable within 1 K at all times. Migration from the container to the new building offered an opportunity to make changes to the RAMSES instrument itself. For instance, stray light suppression was further improved, selection of photomultiplier tubes was optimized, and the near-range receiver was redesigned to enhance its daytime capabilities. Further, in addition to the water spectrometer for calibrated measurements of cloud Raman backscatter-coefficient spectra, a second spectrometer was implemented for studies of the fluorescence spectra of atmospheric aerosols. At the conference, these technical modifications are discussed, and first measurement examples with the improved lidar are presented.

Proceedings Article | 20 October 2014 Paper

Synergy between ground-based remote sensing systems in microphysical analysis of cirrus clouds

V. Wolf, J. Reichardt, Ulrich Görsdorf, Andrew Reigert, R. Leinweber, Volker Lehmann

Proceedings Volume 9246, 92460K (2014) https://doi.org/10.1117/12.2065674

KEYWORDS: Clouds, Particles, LIDAR, Backscatter, Raman spectroscopy, Remote sensing, Radar, Mirrors, Statistical analysis, Lawrencium

Read Abstract +

A broad suite of ground-based remote sensing instruments of the Meteorological Observatory Lindenberg, Germany, is combined for the first time to synergistically analyze cirrus cloud microphysics, including a Raman lidar, a Ka band cloud radar and a 5ff tilted ceilometer. 84 days of cirrus cloud measurements have been selected to study the correlation between, and the dependences of, the different measured variables. The presented study investigates the effect of the spatial orientation and the shape of solid cloud particles on particle optical properties and their relation to wind and turbulence parameters. A sensitive indicator of particle spatial orientation is the particle depolarization ratio (PDR). When ice crystals are horizontally aligned, mirror reflections can occur, which is evidenced by low PDR if observed with a vertically pointing Raman lidar. Observations are grouped according to the prevailing weather condition. It is found that on some days PDR is constant for long time periods. Interestingly, during warm fronts the PDR is generally small (<0.2), while during cold fronts it is high (> 0.4). Moreover, the mean lidar ratio of cirrus with high PDR is about 20 sr, two times larger than of cirrus with low PDR. Similar dependences on PDR have been found for the particle extinction coefficient, and for the backscatter coefficient from the tilted ceilometer, but for the Raman lidar backscatter coefficient in perpendicular polarization the opposite behavior is observed.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years