Full-time professor at the Free University of Brussels, Belgium
apreat@gmail.com
apreat@ulb.ac.be
• Department of Earth Sciences and Environment
Res. Grp. - Biogeochemistry & Modeling of the Earth System
Sedimentology & Basin Analysis
• Alumnus, Collège des Alumni, Académie Royale de Sciences, des Lettres et des Beaux Arts de Belgique (mars 2013). http://www.academieroyale.be/cgi?usr=2a8crwkksq&lg=fr&pag=858&rec=0&frm=0&par=aybabtu&id=4471&flux=8365323
• Prof. Invited, Université de Mons-Hainaut (2010-present-day)
• Prof. Coordinator and invited to the Royal Academy of Sciences of Belgium (Belgian College) (2009-
present day)
• Prof. partim to the DEA (third cycle) led by the University of Lille (9 universities from 1999 to 2004) - Prof. partim at the University of Paris-Sud/Orsay, European-Socrates Agreement (1995-1998)
• Prof. partim at the University of Louvain, Convention ULB-UCL (1993-2000)
• Since 2015 : Member of Comité éditorial de la Revue Géologie de la France http://geolfrance.brgm.fr
• Since 2014 : Regular author of texts for ‘la Revue Science et Pseudosciences’ http://www.pseudo-sciences.org/
• Many field works (several weeks to 2 months) (Meso- and Paleozoic carbonates, Paleo- to Neoproterozoic carbonates) in Europe, USA (Nevada), Papouasia (Holocene), North Africa (Algeria, Morrocco, Tunisia), West Africa (Gabon, DRC, Congo-Brazzaville, South Africa, Angola), Iraq... Recently : field works (3 to 5 weeks) Congo- Brazzaville 2012, 2015, 2016 (carbonate Neoproterozoic).
Degree in geological sciences at the Free University of Brussels (ULB) in 1974, I went to Algeria for two years teaching mining geology at the University of Constantine. Back in Belgium I worked for two years as an expert for the EEC (European Commission), first on the prospecting of Pb and Zn in carbonate environments, then the uranium exploration in Belgium. Then Assistant at ULB, Department of Geology I got the degree of Doctor of Sciences (Geology) in 1985. My thesis, devoted to the study of the Devonian carbonate sedimentology of northern France and southern Belgium, comprised a significant portion of field work whose interpretation and synthesis conducted to the establishment of model of carbonate platforms and ramps with reefal constructions.
I then worked for Petrofina SA and shared a little more than two years in Angola as Director of the Research Laboratory of this oil company. The lab included 22 people (micropaleontology, sedimentology, petrophysics). My main activity was to interpret facies reservoirs from drillings in the Cretaceous, sometimes in the Tertiary. I carried out many studies for oil companies operating in this country.
I returned to the ULB in 1988 as First Assistant and was appointed Professor in 1990. I carried out various missions for mining companies in Belgium and oil companies abroad and continued research, particularly through projects of the Scientific Research National Funds (FNRS).
My research still concerns sedimentology, geochemistry and diagenesis of carbonate rocks which leads me to travel many countries in Europe or outside Europe, North Africa, Papua New Guinea and the USA, to conduct field missions.
Since the late 90's, I expanded my field of research in addressing the problem of mass extinctions of organisms from the Upper Devonian series across Euramerica (from North America to Poland) and I also specialized in microbiological and geochemical analyses of ancient carbonate series developing a sustained collaboration with biologists of my university. We are at the origin of a paleoecological model based on the presence of iron-bacterial microfossils, which led me to travel many countries in Europe and North Africa. This model accounts for the red pigmentation of many marble and ornamental stones used in the world. This research also has implications on the emergence of Life from the earliest stages of formation of Earth, as well as in the field of exobiology or extraterrestrial life ...
More recently I invested in the study from the Precambrian series of Gabon and Congo. These works with colleagues from BRGM (Orléans) are as much about the academic side (consequences of the appearance of oxygen in the Paleoproterozoic and study of Neoproterozoic glaciations) that the potential applications in reservoir rocks and source rocks of oil (in collaboration with oil companies).
Finally I recently established a close collaboration with the Royal Institute of Natural Sciences of Belgium to study the susceptibility magnetic signal from various European Paleozoic series. All these works allowed me to gain a thorough understanding of carbonate rocks (petrology, micropaleontology, geobiology, geochemistry, sequence stratigraphy, diagenesis) as well in Precambrian (2.2 Ga and 0.6 Ga), Paleozoic (from Silurian to Carboniferous) and Mesozoic (Jurassic and Cretaceous) rocks. Recently (2010) I have established a collaboration with Iraqi Kurdistan as part of a government program to boost scientific research in this country.
My research led me to publish about 180 papers in international and national journals and presented more than 170 conference papers. I am a holder of eight courses at the ULB (5 mandatory and 3 optional), excursions and field stages, I taught at the third cycle in several French universities and led or co-managed a score of 20 Doctoral (PhD) and Post-doctoral theses and has been the promotor of more than 50 Masters theses.
The long term forecast for Europe, where it is already colder than normal, shows temperatures plummeting to near -20°C in parts of Central Europe by early next week, extending what has been already a brutal winter.
Europeans longing for spring will just have to be patient for awhile. Indeed this winter has been a harsh one across the northern hemisphere with record cold temperatures being set from Siberia to North America to Japan. Also a number of places have seen record snowfalls.
The European Alps have had one of the snowiest winters in years as snow continues to pile up meters high.
The bizarre issue of climate catastrophism has been around suf ciently long that it has become possible to trace its history in detail, and, indeed, several excellent re- cent books do this, placing the issue in the context of a variety of environmental, economic and political trends.
by P. Homewood, February 21, 2018 in NotaLotofPeopleKnowThat
The Arctic Ocean once froze reliably every year. Those days are over.
Arctic sea ice extent has been measured by satellites since the 1970s. And scientists can sample ice cores, permafrost records, and tree rings to make some assumptions about the sea ice extent going back 1,500 years. And when you put that all on a chart, well, it looks a little scary (…)
From the EUROPEAN COMMISSION JOINT RESEARCH CENTRE and the “Dr. Roger Pielke Sr. was right” department. I suspect a whole bunch of climate models that don’t take this into consideration, and think CO2 is the dominant climate driver, are going to need to be revised.
Land use change has warmed the Earth’s surface
Natural ecosystems play a crucial role in helping combat climate change, air pollution and soil erosion. A new study by a team of researchers from the Joint Research Centre, the European Commission’s science and knowledge service, sheds light on another, less well-known aspect of how these ecosystems, and forests in particular, can protect our planet against global warming.
by Bjorn Lomborg, February 20, 2018 in ClimateChangeDispatch
The world is mostly run on fossil fuels (81%). Nuclear makes up 5%, with 14% from renewables. Solar panels and wind turbines contribute 0.8%.
When you hear 14% renewables, you will likely think ‘wow, things are going pretty well with the switch to renewables’. But these renewables are not the ones you hear about. The biggest contributor is humanity’s oldest fuel: wood (…)
A new study on the timescale of plant evolution has concluded that the first plants to colonize the Earth originated around 500 million years ago — 100 million years earlier than previously thought.
For the first four billion years of Earth’s history, our planet’s continents would have been devoid of all life except microbes.
From Keele University and the “It’s like deja vu all over again” department with the leader of the “ship of fools” thrown in for comic relief. Long-time WUWT readers surely remember the single “Most influential tree in the world” from the Yamal fiasco, where the “signal” in one tree (YAD06) biased an entire paper with a hockey stick shape, making it worthless. Well, here we are again with another single tree used to define the entire globe. Obviously they’ve learned nothing, then again, it’s Chris Turney.
In popular culture, asteroids play the role of apocalyptic threat, get blamed for wiping out the dinosaurs — and offer an extraterrestrial source for mineral mining. But for one researcher, asteroids play an entirely different role: that of time capsules showing what molecules originally existed in our solar system. Having that information gives scientists the starting point they need to reconstruct the complex pathway that got life started on Earth.
Earlier this month, the authors of a new paper (Partridge et al., 2018) published in Geophysical Research Letters promulgated the term “warming hole” to describe the cooling temperatures gripping most of the Eastern half of the United States from the late 1950s through 2015
I missed this report at the time, but it is a comprehensive account of how large scale adjustments of temperatures have made global temperature datasets virtually worthless. (…)
by Eck, February 15, 2018 in K. Richard NoTricksZone
A new scientific study says surface temperatures in the Northeastern U.S. (Appalachian Mountains) have undergone a significant long-term cooling trend since the early 20th century, complicating the detection of a clear anthropogenic global warming (AGW) signal for the region.
According to Eck (2018), the two coldest Appalachian winters since 1910 were recorded in recent years (2009-’10 and 2010-’11), and 9 of the 10 warmest winters occurred prior to 1960.
In the early 1930s, Appalachian winters were 4.7°C warmer than they have been during the last 30 years (1987-2017).
A recently highlighted paper published by atmospheric scientists Scafetta et al., (2017) featured a graph (above) documenting post-2000 trends in the published estimates of the Earth’s climate sensitivity to a doubling of CO2 concentrations (from 280 parts per million to 560 ppm).
Prologue: I have been writing recently about Sea Level Rise, both as particular local examples ( Guam, Canton, Miami, New York, and NY/NJ ) and in the series SEA LEVEL: Rise and Fall, of which this is the fourth-plus installment.
When the seabed loses its stability and starts to move, it often happens in much larger dimensions than landslides ashore — and at slopes with very low gradients. At the same time, discplacement of large amounts of sediment under water scan cause devastating tsunamis. However, why and when submarine landslides develop is hardly understood. Marine scientists have now published possible causes based on observations on submarine landslides off the coast of northwest Africa.
GEOMAR researchers find links between sedimentation and methane seeps on the seafloor off the coast of Norway
Large amounts of the greenhouse gas methane are locked up as solid gas hydrates in the continental slopes of ocean margins. Their stability depends on low temperatures and high pressure. However, other factors that influence gas hydrate stability are not as well understood. A German-Norwegian research team has found evidence off the coast of Norway that the amount of sediment deposited on the seafloor can play a crucial role. The study has been published today in the international journal Nature Communications.
Different sea level reconstructions show a spread in sea level rise over the last six decades and it is not yet certain whether the sum of contributors explains the reconstructed rise (…)
The record snowfalls of 2018 that are sweeping across the Northern Hemisphere and continuing the growth trend in winter snowfall levels provide yet more compelling evidence that the UN IPCC AR5 WG1 climate report and models are flawed because this report concludes that future snowfall level trends will only decline.(…)
by Julian Lee, February 11, 2018 in BloombergGadlfy
The latest surge in U.S. oil output will probably hasten the country’s rise to the top of the producer pile. More important, it’s starting to look as though at least half of OPEC’s nightmare scenario for 2018 — a surge in shale output and slowdown in demand growth — is coming true.
Last week’s avalanche of releases from the U.S. Department of Energy showed daily oil production above 10 million barrels a day for the first time since 1970.
by Dr S. Crockford, February 12, 2018 in ClimateChangeDispatch
It acknowledges that polar bear numbers have not declined in recent years even though summer sea ice dropped dramatically but goes on to perpetuate a number of myths that might not have happened if the author had done his homework or quizzed his other experts as thoroughly as he did me.
Rankin Inlet, Nunavut gets cold in the winter. Located on the northwestern shore of the Hudson Bay at 62 degrees north and between Chesterfield Inlet and Arviat, the town is definitely in a remote yet exposed region. Weather is just a part of life and recently the weather has been colder than cold.
A synthesis of paleotemperature reconstructions from published case studies suggests warm onshore temperatures persisted across most of Afro-Arabia between 1000 and 1200 CE. (…)
1. During the first 2000 years of our 5000-year civilization, most of the time, the annual average temperature was 2ºC higher than now. The temperature in January was 3-5ºC higher than now.
2. From then on, there was a series of temperature fluctuations. The lowest temperatures occurred in AD 1000, 400, 1200, and 1700. The range of fluctuation was 1-2ºC.
3. In every 400-800 period, a smaller cycle lasting 50 to 100 years can be detected with a temperature range of 0.5 -1ºC.
4. During the above cycles, it seems that any coldest period started from the Pacific coast of East Asia. The cold waves then moved westward to Europe and the Atlantic coasts. And at the same time, there were also trends from the North to the South.
Surprise! Poster child for sea level rise, Tuvalu, is actually growing!
From the “we told you so, again, and again” department. We’ve had several articles about the island of Tuvalu and the ridiculous claims of sea level rise causing it to disappear, while at the same time they are building new hotels and airports to attract tourists. Willis has also had several articles on how Pacific atolls grow, and float, rather than sink as sea level advances.
Now, a study confirms what we’ve already known – atolls, and in particular Tuvalu is growing, and increasing land area. So much for climate alarmism. From Nature communications:
La géologie, une science plus que passionnante … et diverse
