scholarly journals A rescued dataset of sub-daily meteorological observations for Europe and the southern Mediterranean region, 1877–2012

2018 ◽  
Vol 10 (3) ◽  
pp. 1613-1635 ◽  
Author(s):  
Linden Ashcroft ◽  
Joan Ramon Coll ◽  
Alba Gilabert ◽  
Peter Domonkos ◽  
Manola Brunet ◽  
...  
Keyword(s):  
Quality Control ◽  
Mediterranean Region ◽  
Climate Variables ◽  
Daily Data ◽  
Weather Observations ◽  
Weather And Climate ◽  
Future Data ◽  
Southern Mediterranean ◽  
Control Procedures ◽  
Meteorological Observations

Abstract. Sub-daily meteorological observations are needed for input to and assessment of high-resolution reanalysis products to improve understanding of weather and climate variability. While there are millions of such weather observations that have been collected by various organisations, many are yet to be transcribed into a useable format.Under the auspices of the Uncertainties in Ensembles of Regional ReAnalyses (UERRA) project, we describe the compilation and development of a digital dataset of 8.8 million meteorological observations of essential climate variables (ECVs) rescued across the European and southern Mediterranean region. By presenting the entire chain of data preparation, from the identification of regions lacking in digitised sub-daily data and the location of original sources, through the digitisation of the observations to the quality control procedures applied, we provide a rescued dataset that is as traceable as possible for use by the research community.Data from 127 stations and of 15 climate variables in the northern African and European sectors have been prepared for the period 1877 to 2012. Quality control of the data using a two-step semi-automatic statistical approach identified 3.5 % of observations that required correction or removal, on par with previous data rescue efforts.In addition to providing a new sub-daily meteorological dataset for the research community, our experience in the development of this sub-daily dataset gives us an opportunity to share some suggestions for future data rescue projects.All versions of the dataset, from the raw digitised data to data that have been quality controlled and converted to standard units, are available on PANGAEA: https://doi.org/10.1594/PANGAEA.886511 (Ashcroft et al., 2018).

scholarly journals A rescued dataset of sub-daily meteorological observations for Europe and the southern Mediterranean region, 1877–2012

2018 ◽  
Author(s):  
Linden Ashcroft ◽  
Joan Ramon Coll ◽  
Alba Gilabert ◽  
Peter Domonkos ◽  
Enric Aguilar ◽  
...  
Keyword(s):  
Quality Control ◽  
Mediterranean Region ◽  
Global Climate ◽  
Research Community ◽  
Climate Variables ◽  
The European Union ◽  
Daily Data ◽  
Future Data ◽  
Southern Mediterranean ◽  
Meteorological Observations

Abstract. Sub-daily meteorological observations are needed for input to and assessment of high-resolution reanalysis products to improve understanding of weather and climate variability. While there are millions such weather observations that have been collected by various organizations, many are yet to be transcribed into a useable format. Under the auspices of the European Union funded Uncertainties in Ensembles of Regional ReAnalysis (UERRA) project, we describe the compilation and development of a digital dataset of 8.8 million meteorological observations rescued across the European and southern Mediterranean region, many of them Essential Climate Variables (ECVs) as defined by the Global Climate Observing System (GCOS). By presenting the entire chain of data preparation, from the identification of regions lacking in digitized sub-daily data and the locating of original sources, through the digitization of the observations to the quality control procedures applied, we provide a rescued dataset that is as traceable as possible for use by the research community. Data from 127 stations and of 15 climate variables in the northern Africa and European sectors have been prepared for the period 1877 to 2012. Quality control of the data using a two-step semi-automatic statistical approach identified 3.5 % of observations that required correction or removal, on par with previous data rescue efforts. In addition to providing a new sub-daily meteorological dataset for the research community, our experience in the development of this UERRA sub-daily dataset gives us an opportunity to share guidance on future data rescue projects. All data are available on PANGAEA: doi:10.1594/PANGAEA.886511.

scholarly journals Data rescue of national and international meteorological observations at Deutscher Wetterdienst

2015 ◽  
Vol 12 (1) ◽  
pp. 57-61 ◽  
Author(s):  
F. Kaspar ◽  
B. Tinz ◽  
H. Mächel ◽  
L. Gates
Keyword(s):  
Quality Control ◽  
Current Status ◽  
Weather Observations ◽  
The World ◽  
Meteorological Observations

Abstract. Germany's national meteorological service (Deutscher Wetterdienst, DWD) houses in Offenbach and Hamburg huge archives of historical handwritten journals of weather observations. They comprise not only observations from Germany, but also of the oceans and land stations in many parts of the world. DWD works on the digitization and quality control of these archives. The current status is presented here.

Rescue of Ukrainian early historical climatological data

2020 ◽  
Author(s):  
Dmytro Boichuk ◽  
Jürg Luterbacher ◽  
Rob Allan ◽  
Olesya Skrynyk ◽  
Vladyslav Sidenko ◽  
...  
Keyword(s):  
Quality Control ◽  
Extreme Events ◽  
Meteorological Data ◽  
Hard Copy ◽  
Climate Services ◽  
Present Information ◽  
Control Procedures ◽  
Temperature Records ◽  
Meteorological Observations ◽  
The 19Th Century

<p>Modern climate applications and climate services are seeing the need for more data and information (including its historical part) on climate variability at high temporal and spatial resolution. Therefore, daily or even sub-daily meteorological data are required increasingly to feel this gap and provide the basis for climate research, extreme events analysis and impact studies.</p><p>The main objective of our work is to present information on results of data rescue (DARE) activity conducted recently in the Ukrainian Hydrometeorological Institute (UHMI, Kyiv, Ukraine) in close collaboration with several national and international partners. Our DARE activity was concentrated mainly on the original sub-daily, pre-1850 meteorological observations conducted at eight meteorological stations located in the territory of modern Ukraine, namely Kyiv, Kharkiv, Poltava, Kamyanets-Podilsky, Lugansk, Dnipro, Kherson and Odesa. These eight stations are the only ones, whose pre-1850 data have been found in an archive of the Central Geophysical Observatory (CGO), an observation institution of the Ukrainian Weather Service.</p><p>The data are contained in 38 special hard copy books. Before digitization, the book pages were photocopied to create a database of the images of all the paper sources. Its two copy versions are now stored at the UHMI and CGO, respectively. After the creation of the images database, the data were digitized manually by the authors. In total 291 103 values were digitized. These include 165 980 air temperature records (~57% of the total), 124 376 atmospheric pressure measurements (~42.7%) and 747 precipitation totals (~0.3%).</p><p>Quality control of the digitized data was conducted, including intercomparisons between the stations as well as comparisons with monthly temperature data that were digitized previously from other sources. The quality control procedures revealed a fairly good agreement among the rescued time series on the monthly time scale as well as a good accordance with the monthly data from other sources. However, several periods at some stations should be used with caution, due to relatively large discrepancies revealed. The rescued digital dataset can be used for different meteorological and climatological purposes, including the analysis of extreme events for the pre-1850 period in comparison with today’s climate, regional climatological studies, etc. The dataset is an important supplement to existing digitized archives of meteorological measurements that were performed in the first half of the 19th century.</p>

Studies and Application of Auger Monitoring System for Quality Control and Assurance of Al Bondpads

2016 ◽  
Author(s):  
Hua Younan
Keyword(s):  
Quality Control ◽  
Sample Preparation ◽  
Monitoring System ◽  
Failure Mechanisms ◽  
Wafer Fabrication ◽  
Contamination Level ◽  
Auger Analysis ◽  
Low Level ◽  
Monitoring Frequency ◽  
Control Procedures

Abstract In wafer fabrication (Fab), Fluorine (F) based gases are used for Al bondpad opening process. Thus, even on a regular Al bondpad, there exists a low level of F contamination. However, the F level has to be controlled at a lower level. If the F level is higher than the control/spec limits, it could cause F-induced corrosion and Al-F defects, resulting in pad discoloration and NSOP problems. In our previous studies [1-5], the theories, characteristics, chemical and physical failure mechanisms and the root causes of the F-induced corrosion and Al-F defects on Al bondpads have been studied. In this paper, we further study F-induced corrosion and propose to establish an Auger monitoring system so as to monitor the F contamination level on Al bondpads in wafer fabrication. Auger monitoring frequency, sample preparation, wafer life, Auger analysis points, control/spec limits and OOC/OOS quality control procedures are also discussed.

Quality Control of Meteorological Observations

1991 ◽  
Author(s):  
Toke Jayachandran ◽  
Richard Franke
Keyword(s):  
Quality Control ◽  
Meteorological Observations
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