Dr Neil Humpage

photoPDRA in Earth Observation Science

MPhys (Oxford), PhD (Imperial College London)

Tel: +44 (0)116 294 4573

Email: nh58@le.ac.uk

Office: Room 115, Michael Atiyah Building

Biography

Dr Neil Humpage studied physics at St. Anne's College, University of Oxford (graduating in 2005), before working towards a PhD with the Space and Atmospheric Physics group at Imperial College London. During his PhD he worked on a far-infrared Fourier transform spectrometer which he used to investigate the radiative properties of cirrus clouds and water vapour through field measurements, including a month spent at an atmospheric monitoring site north of the Arctic Circle in Barrow, Alaska. Dr Humpage joined the Earth Observation Science group at the University of Leicester in 2009, initially working towards development of a laboratory demonstrator of infrared imaging FTS technology. Since then, he has contributed towards a number of CEOI-ST, ESA and NERC projects with a broad focus on new instrumental techniques for atmospheric remote sensing. He is currently part of the greenhouse gases group lead by Dr Hartmut Boesch, with whom he is working on the testing, calibration and operation of infrared spectrometers for greenhouse gas observations.

Research interests

Calibration and deployment of the GHOST airborne spectrometer

GHOST is a novel, compact shortwave infrared (SWIR) grating spectrometer developed to fly on board the NASA Global Hawk within the framework of the NERC CAST (Co-ordinated Airborne Studies in the Tropics) project. It has been designed to collect observations of tropospheric CO2, CO, CH4, H2O columns and the HDO/H2O ratio over the ocean. The primary science objectives of GHOST are to provide observations which will: 1. Test atmospheric transport models (e.g., transition zone between tropics and subtropics or large-scale continental outflow); 2. Validate satellite GHG column observations over the oceans thereby filling a critical gap of current validation networks; 3. Complement in situ TTL tracer observations from the Global Hawk to help link the upper troposphere with lower troposphere concentration measurements. GHOST was designed and built at the UK Astronomy Technology Centre (ATC) in Edinburgh, and has now been deployed on both the NASA Global Hawk and the NERC Airborne Research and Survey Facility (ARSF) Dornier 228.

In-situ FTIR observations of trace gases in support of GAUGE

The overall objective of the NERC Greenhouse gAs Uk and Global Emissions (GAUGE) programme is to quantify the UK greenhouse gas (GHG) budget in order to underpin the development of effective emission reduction policies. The project will develop high-resolution estimates of UK GHG sources/sinks using a new, purpose-built measurement network, and will improve global GHG flux estimates through the exploitation of all available in situ and remote sensing data. Our contribution to GAUGE will be to deploy an in-situ FTIR gas analyzer (supplied by ECOTECH) in the field, coincident with other ground-based (e.g. tall tower) observations. The instrument can simultaneously measure high-precision concentrations of CO2 (0.05 ppm), CH4 (0.2 ppb), N2O (<0.06 ppb) and CO (0.2 ppb). The analyzer consists of a 24 m pathlength multipass sample cell coupled to a Bruker IRcube FTIR spectrometer (1800-5000 cm-1, spectral resolution 1 cm-1). The operation is fully automated and enables rapid quantitative analysis of trace gases in air. The trace gas concentrations are inferred from the best-fit to measured spectra without the need for frequent gas calibrations. Absolute accuracy is established by reference to calibration gas standards, and we will use common calibration scales to the other in situ analyzers used in GAUGE. The analyzer is currently based at St Nicholas Church in Glatton, Cambridgeshire, and was also deployed during the GAUGE Emissions Hotspots campaign in August 2014 at Masons Landfill Site, Great Blakenham, Suffolk.

Publications

N Harris, L Carpenter, J Lee, G Vaughan, M Filus, R Jones, B OuYang, J Pyle, A Robinson, S Andrews, A Lewis, J Minaeian, A Vaughan, J Dorsey, M Gallagher, M Le Breton, R Newton, C Percival, H Ricketts, S Baugitte, G Nott, A Wellpott, M Ashfold, J Flemming, R Butler, P Palmer, P Kaye, C Stopford, C Chemel, H Boesch, N Humpage, A Vick, A MacKenzie, R Hyde, P Angelov, E Meneguz, and A Manning, 2016: Co-ordinated Airborne Studies in the Tropics (CAST). Bulletin of the American Meteorological Society. doi:10.1175/BAMS-D-14-00290.1, in press

A Regan, P Silvistrin, D Fernandez, K Atkinson, N Leveque, R Bird, J Johannessen, T Nagler, H Rott, A Stoffelen, M Wooster, N Humpage, JJ Remedios, Sentinel Convoy: Synergetic Earth observation with satellites flying in formation with European operational missions, Acta Astronautica, submitted for publication 2015

C Fox, PD Green, JC Pickering, N Humpage, Analysis of far-infrared spectral radiance observations of the water vapor continuum in the Arctic, Journal of Quantitative Spectroscopy and Radiative Transfer 155 (2015) 57-65; doi:10.1016/j.jqsrt.2015.01.001

N Humpage, H Boesch, PI Palmer, PM Parr-Burman, AJA Vick, NN Bezawada, M Black, AJ Born, D Pearson, J Strachan, M Wells, GreenHouse Observations of the Stratosphere and Troposphere (GHOST): a novel shortwave infrared spectrometer developed for the Global Hawk unmanned aerial vehicle, Proc. SPIE 9242, Remote Sensing of Clouds and the Atmosphere XIX; and Optics in Atmospheric Propagation and Adaptive Systems XVII, 92420P (October 17, 2014); http://dx.doi.org/10.1117/12.2067330

A Battaglia, CD Westbrook, S Kneifel, P Kollias, N Humpage, U Lohnert, J Tyynela, GW Petty, G band atmospheric radars: new frontiers in cloud physics, Atmospheric Measurement Techniques 7 (2014) 1527-1546; http://dx.doi.org/10.5194/amt-7-1527-2014

N Humpage, JJ Remedios, MJ Wooster, H Balzter, S Eves, D Hall, Sentinel convoy for land processes and applications: critical review and gap analysis, 1st International Earth Observation Convoy and Constellation Concepts Workshop (2013)

JJ Harrison, N Humpage, NDC Allen, AM Waterfall, PF Bernath, JJ Remedios, Mid-infrared absorption cross sections for acetone (propanone), Journal of Quantitative Spectroscopy and Radiative Transfer 112 (2011) 457-464; http://dx.doi.org/10.1016/j.jqsrt.2010.09.002

N Humpage, PD Green, JE Harries, Far-infrared spectral radiance observations and modelling of arctic cirrus: preliminary results from RHUBC, Current Problems in Atmospheric Radiation (IRS 2008) edited by T. Nakajima and M.A. Yamasoe (2009) 466-469; http://dx.doi.org/10.1063/1.3117022

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