Marcel Crok

Marcel Crok
Marcel Crok

MS

About

14
Publications
2,774
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
32
Citations
Introduction
I have a background in physical chemistry. After university I became a science writer. The last 12 years I specialised in climate change. With funding from the Dutch government I reviewed the IPCC AR5 Working Group I report. With the Dutch institutes KNMI and PBL I set up an international discussion platform: climatedialogue.org. Wrote a report with independent British researcher Nic Lewis about climate sensitivity.

Publications

Publications (14)
Article
Full-text available
The widely used Global Historical Climatology Network (GHCN) monthly temperature dataset is available in two formats - non-homogenized and homogenized. Since 2011, this homogenized dataset has been updated almost daily by applying the "Pairwise Homogenization Algorithm" (PHA) to the non-homogenized datasets. Previous studies found that the PHA can...
Article
Full-text available
The widely used Global Historical Climatology Network (GHCN) monthly temperature dataset is available in two formats—non-homogenized and homogenized. Since 2011, this homogenized dataset has been updated almost daily by applying the “Pairwise Homogenization Algorithm” (PHA) to the non-homogenized datasets. Previous studies found that the PHA can pe...
Article
Full-text available
In 2016, the Royal Dutch Meteorological Office (KNMI) homogenized the daily temperature records for the Netherlands from 1901 to 1950 to allow a realistic comparison of the temperatures from 1901 to the present. The homogenizations for the main station De Bilt were carried out using a Percentile Matching Method (PMM) with one reference station and...
Technical Report
Full-text available
This report (written in Dutch) discusses the KNMI climate scenarios for The Netherlands. We give arguments why these scenarios will likely not come true. We also explain that most of the warming so far in The Netherlands is due to a jump in the temperature at the end of the 1980-ies.
Article
Full-text available
In the Netherlands, there is a vigorous debate on ammonia emissions, atmospheric concentrations and deposition between stakeholders and research institutions. In this article, we scrutinise some aspects of the ammonia discourse. In particular, we want to improve the understanding of the methodology for handling experimentally determined ammonia emi...
Technical Report
Full-text available
De focus van onderliggend onderzoek ligt op ammoniakemissies bij bemesting en op trends in atmosfeer- concentraties. Daartoe hebben we van de Wageningen University & Research (WUR) enkele meetreeksen van bemestingsproeven ontvangen (overigens zonder vermelding van spreiding van meetdata en meetonzekerheid) tezamen met het rekenmodel om die metingen...
Technical Report
Full-text available
The Climate Dialogue weblog has been a climate change communication project, following a request by the Dutch Parliament, which asked the Dutch Government ‘to also involve climate sceptics in future studies on climate change’. Climate Dialogue was set up by the Royal Netherlands Meteorological Institute (KNMI), the Netherlands Environmental Assessm...
Technical Report
Full-text available
This report shows that the best observational evidence indicates our climate is considerably less sensitive to greenhouse gases than climate models are estimating. The clues for this and the relevant scientific papers are all referred to in the recently published Fifth Assessment report (AR5) of the Intergovernmental Panel on Climate Change (IPCC)....
Article
Full-text available
We investigate the spatial extent of a statistically highly significant shift in atmospheric temperatures over Europe around 1987-1988 using a boot-strap change point algorithm. According to this algorithm, this change point (average warming of about one degree Celsius) is statistically highly significant (p > 99.9999%). The change point is consist...
Article
Evidence that earth's atmosphere has been warming during the last decades is unequivocal and is attributed to the gradual increase in greenhouse gases, in particular carbon dioxide (CO2). However, the notion of a "global" and "gradual" warming is to some extent misleading: changes can occur rapidly, and there are regions that have been warming fast...
Article
The mapping of genetic material in humans shows the existence of a multitude of receptor proteins that may serve as potential targets for medicinal drugs. The pharmaceutical industry is specifically searching for new compounds that fit these targets and co-operates with specialized companies. For diseases that have their origin in one gene defect,...

Network

Cited By

Projects

Projects (6)
Project
We have reviewed and commented the homogenization of historical temperatures at De Bilt by the Dutch Met Office KNMI
Archived project
Review of the literature on equilibrium climate sensitivity (ECS) and the Transient Climate Response (TCR).