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A Senior Geoscientist with an eclectic set of interests ranging from Botany and Meteorology to Geology and Geophysics.
November 2016 - March 2017
January 1996 - January 1996
- Senior Geophysicist
- The development of an image processing algorithm to locate structural fractures in a onshore test 3D seismic volume.
May 1995 - December 1995
- Senior Geophysicist
- A palinspastic reconstruction and geochemical modelling study to identify the source rock maturation and reservoir trap filling history for the Triassic oil and gas province of the East Irish Sea Basin.
October 1971 - June 1974
University of Lancaster
Field of study
- Environmental Sciences
In this short essay we are looking at climate from a geological perspective. The motivation for this study was to try and determine if high elevation solid surfaces, such as the Tibetan Plateau, are "thermally visible" from space, and if the contrast in land surface elevation between the Cretaceous and the Tertiary can provide a physical explanatio...
In this essay we attempt to quantify and attribute the constituent elements of the power intensity radiant flux transmission recorded in the following two published sources; Oklahoma Climatological Survey (1997) and Kiehl & Trenberth (1997).
Titan, the giant moon of the planet Saturn, is recognized to have meteorological processes involving liquid methane that are analogous to the water generated atmospheric dynamics of planet Earth. We propose here that the climatic features of Titan by contrast are more akin to those of the planet Venus, and that this structural similarity is a direc...
The terrestrial planet Venus is classified by astronomers as an inferior planet because it is located closer to the Sun than the Earth. Venus orbits the Sun at a mean distance of 108.21 Million Km and receives an average annual solar irradiance of 2601.3 W/m 2 , which is 1.911 times that of the Earth. A set of linked forward and inverse climate mod...
In this paper we use the inverse modelling technique, first applied to the atmosphere of the planet Venus, to demonstrate that the process of convective atmospheric mass motion can be invoked to explain the greenhouse effect of the Earth's climate. We propose that the atmospheric cell is the fundamental element of climate, and have developed an alt...
We present here the results of an eXcel spreadsheet designed to calculate the pressure profile for the Venus atmosphere at 1 metre increments from the surface to the lower stratosphere, a modelled vertical height of 100 kilometres. Two equations of state are used here, the pressure, volume, temperature (PVT) version of Boyle’s law, and the applicat...
Abstract: In this paper we present the results of a modelling analysis of the climate of Titan , in which we apply the techniques presented by Kiehl and Trenberth (1997) , and that were used by them to study the climate of the Earth. Our purpose here is to follow the fundamental concept that a terrestrial body that supports the surface presen...
Figure 7 does not form part of the paper and is included for interest to show how the original concept diagram can be adapted to a globe with a lit day and unlit night hemisphere. The day and night time terrestrial radiation values used in Figure 7 derive from the DAET Earth PVT model and sum to the required 470 W/m^2 balance figure for a single li...
Abstract: In this paper we quantify and attribute by inspection the constituent elements of the power intensity radiant flux transmission for the atmosphere of the Earth, as recorded in the following two published sources; Oklahoma Climatological Survey and Kiehl and Trenberth. The purpose of our analysis is to establish the common elements of the...
Abstract. A mathematical model has been created based on meteorological principles, and intended to be applied as a correlative to the standard radiation balance equation used in current climate studies. The Dynamic-Atmosphere Energy-Transport climate model (DAET) is designed to account for the dual environmental nature of all terrestrial globes an...
Précis We describe the use of a climate model based on the adiabatic meteorological process of daytime lit hemisphere solar radiant forced convection, coupled to the nighttime dark hemisphere process of surface diabatic radiant cooling to space. The model is design to study the relationships between the interlinked parameters of Top of Atmosphere (...
In this essay we introduce the concept of Noonworld, a hypothetical solar illuminated tidally locked planet. We develop a climate model based on the meteorological principles of a lit daytime hemisphere of energy surplus that is coupled to a dark nighttime hemisphere of energy deficit. In the model the fundamental mechanism of power intensity flux...
The Mid North Sea High (MNSH) consists of a ridge of Paleozoic strata located in the centre of the North Sea between 55° N and 56° N. In 2010, interest in the Permian of the MNSH was revived by the discovery in Quadrant 44 of the Cygnus gas field. This study focuses on the Zechstein carbonates of the MNSH and uses play concepts that draw an analogy...
Permian stratigraphy, as recorded on the composite log or well report, for Mid North Sea High exploration wells as released by the UK Oil and Gas Authority under The National Archives Open Government Licence Version 3 https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
This file shows the continuous log of daily temperatures recorded at Dome Argus in Antarctica for the period 9th May to 17 December 2008. The Dome Argus automatic weather station is located at Lat: 80 22" 02'S Long: 77 32"21'E and has a surface elevation of 4084 m. During the Austral Winter the last sunset of the 2007-08 summer season at this locat...
Date & Time 08 August 2007 00:00 UTC Satellites Meteosat-9 This year, in Africa, the summer storms of the long rains have been notable. They were part of an active monsoon that extended across the Sahel, producing rain in the Sudan as far north as Khartoum, where a vigorous dust storm or Haboob was reported on 2nd May. More information and detailed...
Two separate classes of anomalous geological body have been identified on 3D seismic data acquired in a continental slope setting on the easten margin of the Rockall Trough . Understanding the nature and origin of these bodies has implications for hydrocarbon exploration strategy, prospect identification and risk analysis. The two classes recognise...
Seismic amplitude anomalies associated with the presence of hydrocarbon gas now play an important role in the exploration of the East Irish Sea Basin. Tilted flat spots were first observed on data acquired by JEBCO Seismic Ltd. in 1986 within the productive Triassic reservoir of the Sherwood Sandstone Group located in Quadrant 110 (offshore North W...
The prospect under study is a shale dominated submarine fan of late Jurassic age located in the UK sector of the North Sea, North-West Europe. The trap consists of a horst block which contains a dipping wedge of Jurassic sediments, truncated and sealed by the erosional unconformity of the Base Cretaceous. The objective of this study is to identify...
The average porosities and net thickness of three associated Early Cretaceous carbonate ramp reservoirs are mapped away from well control; using reprocessed 2-D seismic data for a Middle East oil field, which is in the reservoir appraisal stage of oil field development. Initially the constraints on the properties of the reservoir rocks, and the num...
The average porosities and net thickness of three associated Early Cretaceous carbonate ramp reservoirs are mapped away from well control using reprocessed 2-D seismic data for a Middle East oil field which is in the reservoir appraisal stage of field development. Initially the constraints on the properties of the reservoir rocks and the numerical...
A revised geological map and lithostratigraphic correlation chart are presented for Carboniferous–Lower Jurassic strata in the East Irish Sea Basin (EISB) and contiguous basins of the NW–SE- to NNW–SSE-trending Clyde Belt. The significance of the exceptionally thick Triassic succession (4375 m) is documented in relation to other Triassic rifts of N...
Hydrocarbon fluid in a reservoir can produce Direct Hydrocarbon Indicators (DHIs) on seismic data. However, there is no geophysical parameter that responds solely to hydrocarbons. Most analytical techniques are insensitive to the degree of saturation and are unable to differentiate between commercial and sub-economic saturations. The most common qu...
The East Irish Sea Basin comprises eight or more constituent half grabens, and the Keys Basin depocentre preserves one of the thickest Triassic successions (4250 m) in the British Isles. In the south small eastward-dipping tilted fault blocks are bounded by major N-S growth faults, but in the north larger westward-dipping structures are bounded by...
The attached file demonstrates that there is a predictable relationship between the structural density of a terrestrial body and its none-rotating surface gravity.
Using Newton's gravity law of spherical shells, the geometric relationship between a globe's non-rotating atmospheric gravity gradient δg/δz (T^-2) and the average structural density of the globe can be established.
Titan and Earth have moist condensing volatile atmospheres, whereas Venus and Mars are dry.
Four data points do not make a trend, but any ideas on the impact of latent heat in the process of atmospheric lapse rate formation would be of help.
I am researching the atmospheric dynamics of Titan, the giant moon of the planet Saturn.
I have established the presence of solid methane in the bulk of the moon’s atmosphere.
Does anyone have any data on the specific heat of solid methane ice at a temperature of 90 Kelvin and below?
There are two main processes by which atmospheric carbon dioxide gas can be sequestered into the crustal rocks of the lithosphere. The gas can either be sequestrated as oxidised carbon in the form of lithic carbonate precipitates, which are Arrhenius salts, and so can be formed by geochemical abiotic processes (as well as by biochemical activity) or the gas can be sequestrated as reduced carbon, typically hydrocarbons by biological means. I am assuming that the third process of carbon sequestration, namely polymerisation of methane gas in the presence of radioactive minerals, is not relevant to this discussion, as this requires reduced carbon (methane) for its starting gas and is typically a subterranean process that generates pitchblende (and then graphite by metamorphosis).
The nature and role of stromatolites in the process of atmospheric carbon dioxide sequestration is the issue I would like to focus on. In the published general descriptive literature, there seems to be little acknowledgement that stromatolites are carbonates. The issue of biotic or abiotic origin of the carbonate minerals is irrelevant to the issue of volatile gas to lithic mineral sequestration. If we make the simplistic working assumption that the rate of outgassing of carbon dioxide gas from the mantle is constant throughout Earth’s history, and if we assume an outgassing rate of 1 Earth atmosphere of CO2 per 52 million years (based on an outgassing rate derived from the Venusian atmosphere of 8878 kpa in circa 4.6 billion years), then for the 1.5 billion years of the Archean, some 29 atmospheres of produced CO2 need to be removed for the atmosphere OR the Earth had then lifetime CO2 atmosphere with a surface pressure of circa 40 Atmospheres (including the nitrogen component) and therefore the boiling point of water on Earth 2.5 Bya was some 250 deg C.
The reality probably lies between these two extremes a low C02 atmospheres of say 1 bar (we also require a nitrogen component to allow liquid water to exist), and an upper limit of approx. 40 bar. The key to this analysis is the quantity of carbonates sequestered into the Archean crust by stromatolites. Has anyone got an estimate of the quantity of carbonates produced during the Archean?
Accepted data for the Venusian atmosphere record a surface pressure of 9200 kPa and an atmospheric composition of 3.5% Nitrogen by volume. (NASA data). Using Dalton's Law of Partial Pressure this means that the partial pressure of N2 is 322 kPa and therefore Venus has 4 times as much nitrogen gas as Earth does.
If Venus possessed a CO2 free, nitrogen only atmosphere, then the boiling point of water on Venus would be 136 deg C.
Where does all the nitrogen on Venus come from and how long has the planet had this much nitrogen gas?
To study the impact of surface radiative cooling on the air and ice temperature profiles recorded at the Dome Argus AWS Antarctica during the austral winter of 2008.
To study the application of a mathematical model to the climate structure of the atmosphere surrounding the solar system terrestrial planets Venus, Earth, Mars and also of Titan, the moon of Saturn.