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Dr Karina Williams

Dr Karina Williams

Lecturer

 

Overview

I work on the interactions between vegetation and the atmosphere in climate models. My recent work has been focused on the response of plants to changing water availability, atmospheric carbon dioxide levels and temperature.


I joined Exeter Geography department in September 2019 on a 20% contract, as part of the Global Systems Institute. The rest of the time I work at the Met Office, where I am a Climate Adaptation Senior Scientist in the Earth Systems and Mitigation Science area. I joined the Met Office in 2011. Before that, I worked in Germany, on a three-year Helmholtz Allianz fellowship at the Theoretical Physics department of Bonn University. I received a PhD in Theoretical Physics from Durham University in 2008.

Broad research specialisms:

Land-surface fluxes, vegetation modelling, food resources, drought, water resources, climate change, carbon dynamics

Research

Research interests

I work on the JULES land-surface model, particularly impacts representation such as water stress crops and irrigation. I co-lead JULES process evaluation group on soil moisture stress on vegetation (with Dr Anna Harper) and I lead a working group on using results from Free-Air Carbon Enrichment experiments to evaluate and improve JULES. I am a coordinator of a GMD special issue on the JULES-crop parametrisation.

Previous projects include climate adaptation in the Nile Basin (contract from DHI) and the use of seasonal forecasts with process-based impacts models (focusing on crops) as part of the EUPORIAS EU FP7 project. Current projects include vegetation modelling of Brazilian ecosystems as part of the CSSP Brazil program.

Publications

Key publications | Publications by category | Publications by year

Key publications


Williams KE, Harper AB, Huntingford C, Mercado LM, Mathison CT, Falloon PD, Cox PM, Kim J (2019). How can the First ISLSCP Field Experiment contribute to present-day efforts to evaluate water stress in JULESv5.0?. Geoscientific Model Development, 12(7), 3207-3240. Abstract.
Kimball BA, Boote KJ, Hatfield JL, Ahuja LR, Stockle C, Archontoulis S, Baron C, Basso B, Bertuzzi P, Constantin J, et al (2019). Simulation of maize evapotranspiration: an inter-comparison among 29 maize models. AGRICULTURAL AND FOREST METEOROLOGY, 271, 264-284. Author URL.
Williams K, Gornall J, Harper A, Wiltshire A, Hemming D, Quaife T, Arkebauer T, Scoby D (2017). Evaluation of JULES-crop performance against site observations of irrigated maize from Mead, Nebraska. Geoscientific Model Development, 10(3), 1291-1320. Abstract.
Osborne T, Gornall J, Hooker J, Williams K, Wiltshire A, Betts R, Wheeler T (2015). JULES-crop: a parametrisation of crops in the Joint UK Land Environment Simulator. Geoscientific Model Development, 8(4), 1139-1155. Abstract.
Williams K, Chamberlain J, Buontempo C, Bain C (2015). Regional climate model performance in the Lake Victoria basin. CLIMATE DYNAMICS, 44(5-6), 1699-1713. Author URL.
Williams KE, Falloon PD (2015). Sources of interannual yield variability in JULES-crop and implications for forcing with seasonal weather forecasts. GEOSCIENTIFIC MODEL DEVELOPMENT, 8(12), 3987-3997. Author URL.

Publications by category


Journal articles

Bett PE, Williams K, Burton C, Scaife A, Wiltshire A, Gilham R (In Press). Skillful seasonal prediction of key carbon cycle components: NPP and fire risk.  Abstract.
Franke J, Müller C, Elliott J, Ruane AC, Jagermeyr J, Balkovic J, Ciais P, Dury M, Falloon P, Folberth C, et al (In Press). The GGCMI Phase II experiment: global gridded crop model simulations under uniform changes in CO<sub>2</sub>, temperature, water, and nitrogen levels (protocol version 1.0).  Abstract.
Franke J, Müller C, Elliott J, Ruane AC, Jägermeyr J, Snyder A, Dury M, Falloon P, Folberth C, François L, et al (In Press). The GGCMI phase II emulators: global gridded crop model responses to changes in CO<sub>2</sub>, temperature, water, and nitrogen (version 1.0).  Abstract.
Jones S, Rowland L, Cox P, Hemming D, Wiltshire A, Williams K, Parazoo NC, Liu J, da Costa ACL, Meir P, et al (In Press). The Impact of a Simple Representation of Non-Structural Carbohydrates on the Simulated Response of Tropical Forests to Drought.  Abstract.
Paschalis A, Fatichi S, Zscheischler J, Ciais P, Bahn M, Boysen L, Chang J, De Kauwe M, Estiarte M, Goll D, et al (2020). Rainfall manipulation experiments as simulated by terrestrial biosphere models: Where do we stand?. Glob Chang Biol Abstract.  Author URL.
Eller CB, Rowland L, Mencuccini M, Rosas T, Williams K, Harper A, Medlyn BE, Wagner Y, Klein T, Teodoro GS, et al (2020). Stomatal optimization based on xylem hydraulics (SOX) improves land surface model simulation of vegetation responses to climate. New Phytol Abstract.  Author URL.  Full text.
Pinnington E, Quaife T, Lawless A, Williams K, Arkebauer T, Scoby D (2020). The Land Variational Ensemble Data Assimilation Framework: LAVENDAR v1.0.0. Geoscientific Model Development, 13(1), 55-69. Abstract.
Mathison C, Challinor AJ, Deva C, Falloon P, Garrigues S, Moulin S, Williams K, Wiltshire A (2019). Developing a sequential cropping capability in the JULESvn5.2 land–surface model. Geoscientific Model Development Discussions, 1-50. Abstract.
Williams KE, Harper AB, Huntingford C, Mercado LM, Mathison CT, Falloon PD, Cox PM, Kim J (2019). How can the First ISLSCP Field Experiment contribute to present-day efforts to evaluate water stress in JULESv5.0?. Geoscientific Model Development, 12(7), 3207-3240. Abstract.
Kimball BA, Boote KJ, Hatfield JL, Ahuja LR, Stockle C, Archontoulis S, Baron C, Basso B, Bertuzzi P, Constantin J, et al (2019). Simulation of maize evapotranspiration: an inter-comparison among 29 maize models. AGRICULTURAL AND FOREST METEOROLOGY, 271, 264-284. Author URL.
Pinnington E, Quaife T, Lawless A, Williams K, Arkebauer T, Scoby D (2019). The Land Variational Ensemble Data Assimilation fRamework: LaVEnDAR. Geoscientific Model Development Discussions, 1-26. Abstract.
Harper AB, Wiltshire AJ, Cox PM, Friedlingstein P, Jones CD, Mercado LM, Sitch S, Williams K, Duran-Rojas C (2018). Vegetation distribution and terrestrial carbon cycle in a carbon cycle configuration of JULES4.6 with new plant functional types. Geoscientific Model Development, 11(7), 2857-2873. Abstract.  Full text.
Burton C, Betts RA, Jones CD, Williams K (2018). Will fire danger be reduced by using Solar Radiation Management to limit global warming to 1.5°C compared to 2.0°C. Geophysical Research Letters Full text.
Williams K, Gornall J, Harper A, Wiltshire A, Hemming D, Quaife T, Arkebauer T, Scoby D (2017). Evaluation of JULES-crop performance against site observations of irrigated maize from Mead, Nebraska. Geoscientific Model Development, 10(3), 1291-1320. Abstract.
Buontempo C, Mathison C, Jones R, Williams K, Wang C, McSweeney C (2015). An ensemble climate projection for Africa. CLIMATE DYNAMICS, 44(7-8), 2097-2118. Author URL.
Osborne T, Gornall J, Hooker J, Williams K, Wiltshire A, Betts R, Wheeler T (2015). JULES-crop: a parametrisation of crops in the Joint UK Land Environment Simulator. Geoscientific Model Development, 8(4), 1139-1155. Abstract.
Williams K, Chamberlain J, Buontempo C, Bain C (2015). Regional climate model performance in the Lake Victoria basin. CLIMATE DYNAMICS, 44(5-6), 1699-1713. Author URL.
Williams KE, Falloon PD (2015). Sources of interannual yield variability in JULES-crop and implications for forcing with seasonal weather forecasts. Geoscientific Model Development Discussions, 8(6), 4599-4621. Abstract.
Williams KE, Falloon PD (2015). Sources of interannual yield variability in JULES-crop and implications for forcing with seasonal weather forecasts. GEOSCIENTIFIC MODEL DEVELOPMENT, 8(12), 3987-3997. Author URL.
Bechtle P, Brein O, Heinemeyer S, Stal O, Stefaniak T, Weiglein G, Williams KE (2014). HiggsBounds-4: improved tests of extended Higgs sectors against exclusion bounds from LEP, the Tevatron and the LHC. EUROPEAN PHYSICAL JOURNAL C, 74(3).
Osborne T, Gornall J, Hooker J, Williams K, Wiltshire A, Betts R, Wheeler T (2014). JULES-crop: a parametrisation of crops in the Joint UK Land Environment Simulator. Geoscientific Model Development Discussions, 7(5), 6773-6809. Abstract.
Falloon P, Fereday D, Stringer N, Williams K, Gornall J, Wallace E, Eade R, Brookshaw A, Camp J, Betts R, et al (2013). Assessing Skill for Impacts in Seasonal to Decadal Climate Forecasts. Journal of Geology & Geosciences, 02(03).
Gonzalez P, Palmer S, Wiebusch M, Williams K (2013). Heavy MSSM Higgs production at the LHC and decays to WW, ZZ at higher orders. EUROPEAN PHYSICAL JOURNAL C, 73(3).
Bechtle P, Brein O, Heinemeyer S, Weiglein G, Williams KE (2011). HiggsBounds 2.0.0: Confronting neutral and charged Higgs sector predictions with exclusion bounds from LEP and the Tevatron. COMPUTER PHYSICS COMMUNICATIONS, 182(12), 2605-2631.
Bechtle P, Brein O, Heinemeyer S, Weiglein G, Williams KE (2011). HiggsBounds: Confronting arbitrary Higgs sectors with exclusion bounds from LEP and the Tevatron. COMPUTER PHYSICS COMMUNICATIONS, 181(1), 138-167.
Williams KE, Rzehak H, Weiglein G (2011). Higher-order corrections to Higgs boson decays in the MSSM with complex parameters. EUROPEAN PHYSICAL JOURNAL C, 71(6).
Williams KE, Weiglein G (2008). Precise predictions for h(a)-> h(b)h(c) decays in the complex MSSM. PHYSICS LETTERS B, 660(3), 217-227.
Williams K (2006). RAS science writing competition - Mini monsters. ASTRONOMY & GEOPHYSICS, 47(3), 36-37.

Conferences

Butts MB, Buontempo C, Lorup JK, Williams K, Mathison C, Jessen OZ, Riegels ND, Glennie P, McSweeney C, Wilson M, et al (2016). A regional approach to climate adaptation in the Nile Basin.  Author URL.

Reports

Kraml S, Accomando E, Akeroyd AG, Akhmetzyanova E, Albert J, Alves A, Amapane N, Aoki M, Azuelos G, Baffioni S, et al (2006). CP Studies and Non-Standard Higgs Physics. Abstract.

Publications by year


In Press

Bett PE, Williams K, Burton C, Scaife A, Wiltshire A, Gilham R (In Press). Skillful seasonal prediction of key carbon cycle components: NPP and fire risk.  Abstract.
Franke J, Müller C, Elliott J, Ruane AC, Jagermeyr J, Balkovic J, Ciais P, Dury M, Falloon P, Folberth C, et al (In Press). The GGCMI Phase II experiment: global gridded crop model simulations under uniform changes in CO<sub>2</sub>, temperature, water, and nitrogen levels (protocol version 1.0).  Abstract.
Franke J, Müller C, Elliott J, Ruane AC, Jägermeyr J, Snyder A, Dury M, Falloon P, Folberth C, François L, et al (In Press). The GGCMI phase II emulators: global gridded crop model responses to changes in CO<sub>2</sub>, temperature, water, and nitrogen (version 1.0).  Abstract.
Jones S, Rowland L, Cox P, Hemming D, Wiltshire A, Williams K, Parazoo NC, Liu J, da Costa ACL, Meir P, et al (In Press). The Impact of a Simple Representation of Non-Structural Carbohydrates on the Simulated Response of Tropical Forests to Drought.  Abstract.

2020

Paschalis A, Fatichi S, Zscheischler J, Ciais P, Bahn M, Boysen L, Chang J, De Kauwe M, Estiarte M, Goll D, et al (2020). Rainfall manipulation experiments as simulated by terrestrial biosphere models: Where do we stand?. Glob Chang Biol Abstract.  Author URL.
Eller CB, Rowland L, Mencuccini M, Rosas T, Williams K, Harper A, Medlyn BE, Wagner Y, Klein T, Teodoro GS, et al (2020). Stomatal optimization based on xylem hydraulics (SOX) improves land surface model simulation of vegetation responses to climate. New Phytol Abstract.  Author URL.  Full text.
Pinnington E, Quaife T, Lawless A, Williams K, Arkebauer T, Scoby D (2020). The Land Variational Ensemble Data Assimilation Framework: LAVENDAR v1.0.0. Geoscientific Model Development, 13(1), 55-69. Abstract.

2019

Mathison C, Challinor AJ, Deva C, Falloon P, Garrigues S, Moulin S, Williams K, Wiltshire A (2019). Developing a sequential cropping capability in the JULESvn5.2 land–surface model. Geoscientific Model Development Discussions, 1-50. Abstract.
Williams KE, Harper AB, Huntingford C, Mercado LM, Mathison CT, Falloon PD, Cox PM, Kim J (2019). How can the First ISLSCP Field Experiment contribute to present-day efforts to evaluate water stress in JULESv5.0?. Geoscientific Model Development, 12(7), 3207-3240. Abstract.
Kimball BA, Boote KJ, Hatfield JL, Ahuja LR, Stockle C, Archontoulis S, Baron C, Basso B, Bertuzzi P, Constantin J, et al (2019). Simulation of maize evapotranspiration: an inter-comparison among 29 maize models. AGRICULTURAL AND FOREST METEOROLOGY, 271, 264-284. Author URL.
Pinnington E, Quaife T, Lawless A, Williams K, Arkebauer T, Scoby D (2019). The Land Variational Ensemble Data Assimilation fRamework: LaVEnDAR. Geoscientific Model Development Discussions, 1-26. Abstract.

2018

Harper AB, Wiltshire AJ, Cox PM, Friedlingstein P, Jones CD, Mercado LM, Sitch S, Williams K, Duran-Rojas C (2018). Vegetation distribution and terrestrial carbon cycle in a carbon cycle configuration of JULES4.6 with new plant functional types. Geoscientific Model Development, 11(7), 2857-2873. Abstract.  Full text.
Burton C, Betts RA, Jones CD, Williams K (2018). Will fire danger be reduced by using Solar Radiation Management to limit global warming to 1.5°C compared to 2.0°C. Geophysical Research Letters Full text.

2017

Williams K, Gornall J, Harper A, Wiltshire A, Hemming D, Quaife T, Arkebauer T, Scoby D (2017). Evaluation of JULES-crop performance against site observations of irrigated maize from Mead, Nebraska. Geoscientific Model Development, 10(3), 1291-1320. Abstract.

2016

Butts MB, Buontempo C, Lorup JK, Williams K, Mathison C, Jessen OZ, Riegels ND, Glennie P, McSweeney C, Wilson M, et al (2016). A regional approach to climate adaptation in the Nile Basin.  Author URL.

2015

Buontempo C, Mathison C, Jones R, Williams K, Wang C, McSweeney C (2015). An ensemble climate projection for Africa. CLIMATE DYNAMICS, 44(7-8), 2097-2118. Author URL.
Osborne T, Gornall J, Hooker J, Williams K, Wiltshire A, Betts R, Wheeler T (2015). JULES-crop: a parametrisation of crops in the Joint UK Land Environment Simulator. Geoscientific Model Development, 8(4), 1139-1155. Abstract.
Williams K, Chamberlain J, Buontempo C, Bain C (2015). Regional climate model performance in the Lake Victoria basin. CLIMATE DYNAMICS, 44(5-6), 1699-1713. Author URL.
Williams KE, Falloon PD (2015). Sources of interannual yield variability in JULES-crop and implications for forcing with seasonal weather forecasts. Geoscientific Model Development Discussions, 8(6), 4599-4621. Abstract.
Williams KE, Falloon PD (2015). Sources of interannual yield variability in JULES-crop and implications for forcing with seasonal weather forecasts. GEOSCIENTIFIC MODEL DEVELOPMENT, 8(12), 3987-3997. Author URL.

2014

Bechtle P, Brein O, Heinemeyer S, Stal O, Stefaniak T, Weiglein G, Williams KE (2014). HiggsBounds-4: improved tests of extended Higgs sectors against exclusion bounds from LEP, the Tevatron and the LHC. EUROPEAN PHYSICAL JOURNAL C, 74(3).
Osborne T, Gornall J, Hooker J, Williams K, Wiltshire A, Betts R, Wheeler T (2014). JULES-crop: a parametrisation of crops in the Joint UK Land Environment Simulator. Geoscientific Model Development Discussions, 7(5), 6773-6809. Abstract.

2013

Falloon P, Fereday D, Stringer N, Williams K, Gornall J, Wallace E, Eade R, Brookshaw A, Camp J, Betts R, et al (2013). Assessing Skill for Impacts in Seasonal to Decadal Climate Forecasts. Journal of Geology & Geosciences, 02(03).
Gonzalez P, Palmer S, Wiebusch M, Williams K (2013). Heavy MSSM Higgs production at the LHC and decays to WW, ZZ at higher orders. EUROPEAN PHYSICAL JOURNAL C, 73(3).

2011

Bechtle P, Brein O, Heinemeyer S, Weiglein G, Williams KE (2011). HiggsBounds 2.0.0: Confronting neutral and charged Higgs sector predictions with exclusion bounds from LEP and the Tevatron. COMPUTER PHYSICS COMMUNICATIONS, 182(12), 2605-2631.
Bechtle P, Brein O, Heinemeyer S, Weiglein G, Williams KE (2011). HiggsBounds: Confronting arbitrary Higgs sectors with exclusion bounds from LEP and the Tevatron. COMPUTER PHYSICS COMMUNICATIONS, 181(1), 138-167.
Williams KE, Rzehak H, Weiglein G (2011). Higher-order corrections to Higgs boson decays in the MSSM with complex parameters. EUROPEAN PHYSICAL JOURNAL C, 71(6).

2008

Williams KE, Weiglein G (2008). Precise predictions for h(a)-> h(b)h(c) decays in the complex MSSM. PHYSICS LETTERS B, 660(3), 217-227.

2006

Kraml S, Accomando E, Akeroyd AG, Akhmetzyanova E, Albert J, Alves A, Amapane N, Aoki M, Azuelos G, Baffioni S, et al (2006). CP Studies and Non-Standard Higgs Physics. Abstract.
Williams K (2006). RAS science writing competition - Mini monsters. ASTRONOMY & GEOPHYSICS, 47(3), 36-37.

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