 |
| Titel |
Differences in trends and anomalies of upper-air observations from GPS RO, radiosondes, and AMSU |
| VerfasserIn |
Florian Ladstädter, Hallgeir Wilhelmsen, Andrea K. Steiner |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142860
|
| Publikation (Nr.) |
 EGU/EGU2017-6532.pdf |
|
|
|
|
|
| Zusammenfassung |
| Observations of thermodynamic variables are sparse in the upper-air region, especially when
considering measurements capable of detecting changes in the climate state. In
the upper troposphere/lower stratosphere, temperature measurements with global
coverage, high vertical resolution, and high quality are provided by the GPS Radio
Occultation (RO) satellite dataset. GPS RO now provides 15 years of observations, and
while this is still a short record from a climate perspective, its properties enable a
long-term stable and consistent global data record. Due to its unique properties, also
other upper-air measurement systems such as the global radiosonde network can be
validated.
In this study we use the whole GPS RO record to calculate differences in anomalies
between GPS RO and high-quality radiosondes (Vaisala) to determine potential biases. We
also investigate differences in the observed vertically resolved atmospheric trend
signals between these datasets. Finally we present comparisons to layer-integrated
brightness temperatures from AMSU for upper tropospheric/lower stratospheric
channels. |
|
|
|
|
|
|