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Philip Mulholland

Philip Mulholland
Mulholland Geoscience · Exploration

MSc

About

38
Publications
13,792
Reads
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181
Citations
Introduction
A Senior Geoscientist with an eclectic set of interests ranging from Botany and Meteorology to Geology and Geophysics.
Additional affiliations
November 2016 - March 2017
SpectrumGeo
Position
  • Researcher
January 1996 - January 1996
Ikoda Ltd
Position
  • Senior Geophysicist
Description
  • The development of an image processing algorithm to locate structural fractures in a onshore test 3D seismic volume.
May 1995 - December 1995
Ikoda Ltd
Position
  • Senior Geophysicist
Description
  • 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.
Education
September 1979 - September 1980
University College London
Field of study
  • Ecological Conservation
October 1971 - June 1974
University of Lancaster
Field of study
  • Environmental Sciences

Publications

Publications (38)
Preprint
Full-text available
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...
Preprint
Full-text available
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).
Article
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
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...
Poster
Full-text available
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...
Data
Excel workbook containing the source algorithms, tables, figures and references for the formulation of a predictive temperature constrained pressure profile for the atmosphere of Venus.
Preprint
Full-text available
The application of a lapse rate controlled pressure profile for the atmosphere of Venus as a calibration check for the DAET climate model.
Method
Full-text available
Tables and Workflow Methodology used in the Re-analysis of the Climate of Titan.
Method
Full-text available
Tables and Workflow Methodology for "Clarity". Used in the Sensitivity Test of the DAET Climate Model of Titan.
Preprint
Full-text available
Abstract: In this paper we present the results of a modelling analysis of the climate of Titan [2], in which we apply the techniques presented by Kiehl and Trenberth (1997) [3], 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...
Data
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...
Article
Full-text available
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...
Data
Text figures for the Dynamic-Atmosphere Energy-Transport (DAET) model of Titan
Preprint
Full-text available
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...
Method
Full-text available
Tables and Work flow Methodology used in the analysis of the Climate of Titan. (Loaded as Excel 97 because all previous versions of this file would not download)
Method
Full-text available
Example test of a full hemisphere adiabatic model with a fixed dark side partition ratio of 50% : 50%
Method
Full-text available
This Excel Workbook contains the design features and data used to create and control the Dynamic-Atmosphere Energy-Transport Climate Model for the Earth's three atmospheric cells.
Preprint
Full-text available
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 (...
Preprint
Full-text available
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...
Method
Full-text available
Tables and Work flow methodology used in creating the Noonworld model.
Method
Full-text available
Analysing and attributing the Power Intensity Radiant Flux parameters discussed in the essay "Analysis of Earth Energy Budget Diagrams 21May19"
Method
Full-text available
Calculating the Solar Beam Intercept parameters used for calibrating the CERES image.
Article
Full-text available
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...
Data
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/
Data
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...
Article
Full-text available
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...
Conference Paper
Full-text available
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...
Chapter
Full-text available
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...
Conference Paper
Full-text available
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...
Conference Paper
Full-text available
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...
Chapter
Full-text available
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...
Chapter
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...
Technical Report
Full-text available
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...
Chapter
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...

Questions

Questions (6)
Question
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.
Thank you.
Question
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?
Question
West Caicos Island has a modern example of gypsum formation in association with an algal mat.
Reference:
Holocene Salnia sediments of West Caicos, British West Indies: stratigraphy, mineralogy, and pore-water geochemistry. https://www.osti.gov/biblio/6132465
Question
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?
Question
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?
Question
The source of the marine waters of the Zechstein Sea.
The late Permian East Irish Sea Basin equivalent of the Zechstein Sea is called the Bakevillia Sea because the biota found there originated from the Boreal Sea to the north of Pangea.  Likewise Peryt et al. (2012) in their analysis of the biota for the Werra Cycle of the Southern Permian Basin of Europe established that the original Zechstein Sea basin flood was with cold Boreal seawater and that the Zechstein Sea was originally temperate to cool.
Why the temperate/cool waters of the initial Zechstein Limestone basin in its central locations became warm, remains enigmatic (Peryt et al., 2012).
 Can anyone provide me with field evidence that the second Zechstein Sea cycle biota was Tethys Ocean in origin derived from warm waters flooding in from the east?
Hypothesis: Is it possible for a dual source origin of the Zechstein Sea marine waters?  Cold low-salinity low-density Boreal Sea water derived from the north stratified above warm high-salinity high-density Tethyian water derived from the east?
Peryt, T.M., Raczyński, P., Peryt, D. and Chłódek, K., 2012. Upper Permian reef complex in the basinal facies of the Zechstein Limestone (Ca1), western Poland. Geological Journal, 47(5), pp.537-552

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Projects

Projects (14)
Project
To study the role of marine ocean thermohaline circulation in past climates.
Project
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.
Project
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.