Accurate and homogeneous long-term data records (i.e., data that are forced to look like a common reference) are essential for researching, monitoring, or attenuating changes in climate, for example to describe the state of climate or to detect climate extremes. Likewise, reanalysis needs accurate and homogenized/harmonized data records (i.e., data records in which the unique nature of each sensor is maintained). Temporal changes, such as degradation of instruments, changes of instruments, changes of observation practices, or changes of station location and exposure, cause artificial non-climatic sudden or gradual changes in data records. The magnitude and uncertainty of these changes impact the results of climate trend analyses. Therefore, data intended for applications, such as making a realistic and reliable assessment of historical climate trends and variability, require to be homogenized or harmonized consistently so as to obtain well calibrated data records including measurement uncertainties.

The above described factors influence the quality of different essential climate variables, including atmospheric (e.g., air temperature, precipitation, wind speed), oceanic (e.g., sea surface temperature), and terrestrial (e.g., albedo, snow cover) variables from in-situ observing networks, satellite observing systems, and climate/earth-system model simulations. Our session calls for contributions related to the:

• Calibration, quality control, homogenization/harmonisation and validation of either fundamental or essential climate data records.

• Development of new data records and their analysis (spatial and temporal characteristics, particularly of extremes).

• Examination of observed trends and variability, as well as studies that explore the applicability of techniques/algorithms to data of different temporal resolutions (annual, seasonal, monthly, daily, and sub-daily).

• Rescue and analysis of centennial meteorological observations, with focus on data prior to the 1960s, as a unique source to fill in the gap of knowledge of climate variability over century time-scales. In particular, we encourage wind studies dealing with the observed slowdown (termed “stilling”) of near-surface winds in the last 30-50 years.

Convener: Cesar Azorin-Molina | Co-conveners: Enric Aguilar, Rob Roebeling, Xiaolan Wang
| Tue, 09 Apr, 08:30–10:15, 10:45–12:30, 14:00–15:45
Room 0.14
| Attendance Mon, 08 Apr, 10:45–12:30
Hall X5

Attendance time: Monday, 8 April 2019, 10:45–12:30 | Hall X5

Chairperson: Cesar Azorin-Molina
X5.83 |
Homogenization of climatic time series: The ACMANTv4 software package
Peter Domonkos
X5.84 |
Alexandru Dumitrescu, José A. Guijarro, and Sorin Cheval
X5.85 |
| presentation
Dmytro Boichuk, Olesya Skrynyk, Vladyslav Sidenko, Enric Aguilar, and Oleg Skrynyk
X5.86 |
Pavel Faško, Oliver Bochníček, Jozef Pecho, Ladislav Markovič, and Dalibor Výberčí
X5.88 |
Climate Vulnerability and Risk Assessment in different Homogeneous Climatic Zones for Selected General Circulation Models
(withdrawn after no-show)
Firdos Khan, Jürgen Pilz, Hamd Ullah, Asif Khan, M. Shahid Iqbal, and Shaukat Ali
X5.89 |
Extreme waether events and the correlation to large weather patterns (Grosswetterlage) over middle Europe
Carl Schertel
X5.91 |
R. Iestyn Woolway, Christopher J. Merchant, Jamon Van Den Hoek, Cesar Azorin-Molina, Peeter Noges, Alo Laas, Eleanor B. Mackay, and Ian D. Jones
X5.92 |
Lorenzo Minola, Cesar Azorin-Molina, Jose Antonio Guijarro, and Deliang Chen
X5.93 |
Cesar Azorin-Molina, Tim R. McVicar, Jose A. Guijarro, Blair Trewin, Andrew J. Frost, Lorenzo Minola, Gangfeng Zhang, and Deliang Chen
X5.94 |
Lennart Wern, Cesar Azorin-Molina, Erik Engström, Sverker Hellström, Gangfeng Zhang, Lorenzo Minola, and Deliang Chen
X5.95 |
Gangfeng Zhang, Cesar Azorin-Molina, Peijun Shi, Degen Lin, Jose A. Guijarro, Feng Kong, and Deliang Chen
X5.96 |
Deliang Chen, Lorenzo Milona, Nicole Wesselshmidt, Cesar Azorin-Molina, and Tim R. McVicar
X5.97 |
Soobong Lee, Eunha Sohn, and Jaedong Jang
X5.98 |
Adam Valík, Rudolf Brázdil, Pavel Zahradníček, Radim Tolasz, Martin Možný, and Ladislava Řezníčková
X5.100 |
Melanie Coldewey-Egbers, Jian Xu, Mattia Pedergnana, Diego Loyola, Barry Latter, and Richard Siddans
X5.101 |
| presentation
Souleymane Sy, Fabio Madonna, Monica Proto, Marco Rosoldi, Emanuele Tramutola, and Alessandro di Filippo
X5.102 |
Enric Aguilar and Jose Antonio Guijarro
X5.103 |
Sebastian Hahn, Mariette Vreugdenhil, Thomas Melzer, Matthias Forkel, Wouter Dorigo, and Wolfgang Wagner
X5.104 |
| presentation
Wolfgang Preimesberger, Tracy Scanlon, Chun-Hsu Su, Alexander Gruber, and Wouter Dorigo