Olivier Bock
YOU?
Author Swipe
View article: Impact of convectively coupled tropical waves on the composition, vertical structure of the atmosphere, and tropical cyclogenesis in the region of Cabo Verde in September 2021 during the CADDIWA campaign
Impact of convectively coupled tropical waves on the composition, vertical structure of the atmosphere, and tropical cyclogenesis in the region of Cabo Verde in September 2021 during the CADDIWA campaign Open
In summer, mixed Rossby gravity waves–tropical depressions (MRG-TD) are known to drive intraseasonal humidity variability in the northeastern Atlantic troposphere, modulated by equatorial Rossby (ER) and Kelvin waves. However, their impact…
View article: Global Climate
Global Climate Open
International audience
View article: Changes in global water vapor from observations and reanalysis products
Changes in global water vapor from observations and reanalysis products Open
Understanding the long-term changes in the global water vapor content is critical for assessing natural vs. human-caused climate change. Despite the strong thermodynamical relationship between temperature and water vapor changes, substanti…
View article: Impact of tropical waves on the atmospheric structure and composition above Cabo Verde during the CADDIWA campaign 
Impact of tropical waves on the atmospheric structure and composition above Cabo Verde during the CADDIWA campaign  Open
The Cabo Verde region is subject to the activity of many tropical waves during the boreal summer. They are known to favour or inhibit convective activity, and to play a role in the formation of Tropical Cyclones. A frequency-wavenumber fil…
View article: Homogenization of GNSS integrated water vapour time series using statistical machine learning
Homogenization of GNSS integrated water vapour time series using statistical machine learning Open
We present a novel approach to homogenize daily GNSS water vapour time series using statistical methods and machine learning techniques. The procedure involves three main steps:Segmentation. The aim is to detect the number and position of …
View article: Consistency and Homogeneity of ZTD Estimates from IGS Repro3
Consistency and Homogeneity of ZTD Estimates from IGS Repro3 Open
In 2019-2020, the International GNSS Service (IGS) coordinated its third reanalysis of the complete history of GNSS data collected by the IGS global network since 1994. Ten analysis centers (ACs) participated in this so-called “Repro…
View article: Impact of Convectively Coupled Tropical Waves on the composition and vertical structure of the atmosphere above Cabo Verde in September 2021 during the CADDIWA campaign
Impact of Convectively Coupled Tropical Waves on the composition and vertical structure of the atmosphere above Cabo Verde in September 2021 during the CADDIWA campaign Open
In summer, Mixed Rossby Gravity Waves/Tropical Disturbances (MRG-TD) are known to drive intraseasonal humidity variability in the northeastern Atlantic troposphere, modulated by Equatorial Rossby (ER) and Kelvin waves. However, their impac…
View article: Global Climate
Global Climate Open
Two night marine air temperature (NMAT) datasets are routinely updated and used for analysis in this section: UAHNMAT (Junod and Christy 2020) and CLASSnmat (Cornes et al. 2020). These datasets are evaluated in combination with the HadSST4…
View article: Introduction
Introduction Open
—J. Blunden and T. Boyer In 2023, La Niña conditions that generally prevailed in the eastern Pacific Ocean from mid-2020 into early 2023 gave way to a strong El Niño by October. Atmospheric concentrations of Earth’s major greenhouse gases—…
View article: A statistical method for the attribution of change‐points in segmented <scp>Integrated Water Vapor</scp> difference time series
A statistical method for the attribution of change‐points in segmented <span>Integrated Water Vapor</span> difference time series Open
Many segmentation or change‐point detection methods for homogenizing climate time series compare candidate station data with reference data to eliminate common climate signals and more efficiently detect spurious, non‐climatic changes. One…
View article: Homogenization of GNSS IWV time series and estimation of climatic trends
Homogenization of GNSS IWV time series and estimation of climatic trends Open
Water vapor plays a key role in the Earth's climate as a dominant greenhouse gas. It is also the most efficient actor of heat transfer from the surface to the atmosphere and from low to high latitudes which shapes the global atmospheric ci…
View article: Cyclogenesis in the Tropical Atlantic: First Scientific Highlights from the Clouds–Atmospheric Dynamics–Dust Interactions in West Africa (CADDIWA) Field Campaign
Cyclogenesis in the Tropical Atlantic: First Scientific Highlights from the Clouds–Atmospheric Dynamics–Dust Interactions in West Africa (CADDIWA) Field Campaign Open
During the boreal summer, mesoscale convective systems generated over West Africa propagate westward and interact with African easterly waves, and dust plumes transported from the Sahel and Sahara by the African easterly jet. Once off West…
View article: A statistical method for the attribution of change-points in segmentation of IWV differencetime series
A statistical method for the attribution of change-points in segmentation of IWV differencetime series Open
International audience
View article: Global Climate
Global Climate Open
Air temperature measurements have been made onboard ships for centuries and continue to be collected today thanks to the Voluntary Observing Ship initiative (https://www.ocean-ops.org/reportcard2022/). Gridded datasets of marine air temper…
View article: Introduction
Introduction Open
—J. BLUNDEN, T. BOYER, AND E. BARTOW-GILLIES Earth’s global climate system is vast, complex, and intricately interrelated. Many areas are influenced by global-scale phenomena, including the “triple dip” La Niña conditions that prevailed in…
View article: Precipitation frequency in Med-CORDEX and EURO-CORDEX ensembles from 0.44° to convection-permitting resolution: impact of model resolution and convection representation
Precipitation frequency in Med-CORDEX and EURO-CORDEX ensembles from 0.44° to convection-permitting resolution: impact of model resolution and convection representation Open
Recent studies using convection-permitting (CP) climate simulations have demonstrated a step-change in the representation of heavy rainfall and rainfall characteristics (frequency-intensity) compared to coarser resolution Global and Region…
View article: An improved vertical correction method for the inter-comparison and inter-validation of integrated water vapour measurements
An improved vertical correction method for the inter-comparison and inter-validation of integrated water vapour measurements Open
Integrated water vapour (IWV) measurements from similar or different techniques are often inter-compared for calibration and validation purposes. Results are usually assessed in terms of bias (difference of the means), standard deviation o…
View article: Morphological Differences in Isolated Brook Trout Populations in the Desolation Wilderness of the Sierra Nevada
Morphological Differences in Isolated Brook Trout Populations in the Desolation Wilderness of the Sierra Nevada Open
Brook trout ( Salvelinus fontinalis ) is an invasive species in the Desolation Wilderness of California. But it is unknown to what extent this species is evolving to adapt to isolated high altitude lakes. We quantified morphological differ…
View article: Global Climate
Global Climate Open
© Copyright 2022. Sociedad Meteorológica Estadounidense (AMS). Para obtener permiso para reutilizar cualquier parte de este Trabajo, comuníquese con permisos@ametsoc. org . Cualquier uso del material en este Trabajo que se determine como "…
View article: Reply on RC2
Reply on RC2 Open
Abstract. Integrated water vapour (IWV) measurements from similar or different techniques are often inter-compared for calibration and validation purposes. Results are usually assessed in terms of bias (difference of the means), standard d…
View article: Reply on RC1
Reply on RC1 Open
Abstract. Integrated water vapour (IWV) measurements from similar or different techniques are often inter-compared for calibration and validation purposes. Results are usually assessed in terms of bias (difference of the means), standard d…
View article: GNSSseg, a Statistical Method for the Segmentation of Daily GNSS IWV Time Series
GNSSseg, a Statistical Method for the Segmentation of Daily GNSS IWV Time Series Open
Homogenization is an important and crucial step to improve the usage of observational data for climate analysis. This work is motivated by the analysis of long series of GNSS Integrated Water Vapour (IWV) data, which have not yet been used…
View article: Global warming at near-constant relative humidity further supported by recent in situ observations
Global warming at near-constant relative humidity further supported by recent in situ observations Open
Although global warming is expected to occur at approximately constant relative humidity, the latest IPCC report remains elusive about the magnitude of observed changes in global mean total precipitable water (GTPW) and their attribution. …
View article: An improved vertical correction method for the inter-comparison and inter-validation of Integrated Water Vapour measurements
An improved vertical correction method for the inter-comparison and inter-validation of Integrated Water Vapour measurements Open
Integrated Water Vapour (IWV) measurements from similar or different techniques are often inter-compared for calibration and validation purposes. Results are usually assessed in terms of bias (difference of the means), standard deviation o…
View article: A new method for the attribution of breakpoints in segmentation of IWV difference time series&#160;
A new method for the attribution of breakpoints in segmentation of IWV difference time series  Open
<p>In recent years, the detection and correction of the non-natural irregularities in the long climatic records, so-called homogenization, has been studied. This work is motivated by the problem of identification of origins of the br…
View article: An improved vertical correction method for the inter-comparison of Integrated Water Vapour measurements
An improved vertical correction method for the inter-comparison of Integrated Water Vapour measurements Open
<p>Integrated Water Vapour (IWV) measurements from similar or different techniques are often inter-compared for calibration and validation purposes. Results are traditionally interpreted is terms of bias (difference of the means), st…
View article: Precipitation Frequency in Med-CORDEX and EURO-CORDEX Ensembles from 0.44° to Convection-Permitting Resolution: Impact of Model Resolution and Convection Representation
Precipitation Frequency in Med-CORDEX and EURO-CORDEX Ensembles from 0.44° to Convection-Permitting Resolution: Impact of Model Resolution and Convection Representation Open
Recent studies using convection-permitting (CP) climate simulations have demonstrated a step-change in the representation of heavy rainfall and rainfall characteristics (frequency-intensity) compared to coarser resolution Global and Region…
View article: Extremely Endangered Butterflies of Scattered Central European Dry Grasslands Under Current Habitat Alteration
Extremely Endangered Butterflies of Scattered Central European Dry Grasslands Under Current Habitat Alteration Open
Central European dry grasslands represent extrazonal patches of the Eurasian steppe biome. They suffer from severe habitat alterations due to land-use changes, abandonment, or inappropriate management. The butterflies Chazara briseis (Linn…
View article: Sensitivity of Change-Point Detection and Trend Estimates to GNSS IWV Time Series Properties
Sensitivity of Change-Point Detection and Trend Estimates to GNSS IWV Time Series Properties Open
This study investigates the sensitivity of the GNSSseg segmentation method to change in: GNSS data processing method, length of time series (17 to 25 years), auxiliary data used in the integrated water vapor (IWV) conversion, and reference…