Keith R. Lassey

8.8k citations

77 papers · 3.2k indexed · 1 hit paper · h-index 30

Co-authors: M. J. Ulyatt David C. Lowe Carolyn F. Walker I. D. Shelton C.S. Pinares-Patiño Peter Blattner C. W. Holmes T. N. Barry
Topics: Atmospheric and Environmental Gas Dynamics (29 papers)Ruminant Nutrition and Digestive Physiology (20 papers)Methane Hydrates and Related Phenomena (17 papers)
Cited by: Agronomy and Crop Science Process Chemistry and Technology Global and Planetary Change
Journals: Science Journal of Geophysical Research Atmospheres Geochimica et Cosmochimica Acta
Partner nations: New Zealand Australia United States

In The Last Decade

Keith R. Lassey

75 papers receiving 2.9k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

A 21st-century shift from fossil-fuel to biogenic methane emissions indicated by ¹³ CH ₄

2016 311 citations Hinrich Schaefer, S. E. Mikaloff Fletcher et al. profile →

Peers

Countries citing papers authored by Keith R. Lassey

Since Specialization

Citations

This map shows the geographic impact of Keith R. Lassey's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keith R. Lassey with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keith R. Lassey more than expected).

Fields of papers citing papers by Keith R. Lassey

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keith R. Lassey. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keith R. Lassey. The network helps show where Keith R. Lassey may publish in the future.

Co-authorship network of co-authors of Keith R. Lassey

This figure shows the co-authorship network connecting the top 25 collaborators of Keith R. Lassey. A scholar is included among the top collaborators of Keith R. Lassey based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keith R. Lassey. Keith R. Lassey is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Carbon isotope ratios suggest no additional methane from boreal wetlands during the rapid Greenland Interstadial 21.2 2015 ·Global Biogeochemical Cycles ·Peter Sperlich,Hinrich Schaefer,S. E. Mikaloff Fletcher,Myriam Guillevic,Keith R. Lassey,Célia Sapart,Thomas Röckmann,Thomas Blunier	7
2	Balancing the global methane budget: constraints imposed by isotopes and anthropogenic emission inventories 2010 ·Journal of Integrative Environmental Sciences ·Keith R. Lassey,Shaun Ragnauth	6
3	Evaluation of the sulphur hexafluoride tracer technique for methane emission measurement in forage-fed sheep 2007 ·Proceedings of the New Zealand Society of Animal Production ·(unknown),(unknown),Keith R. Lassey,Ulyatt Mj	2
4	Stable isotopes provide revised global limits of aerobic methane emissions from plants 2007 ·Atmospheric chemistry and physics ·D. F. Ferretti,J. B. Miller,James W. C. White,Keith R. Lassey,Dave Lowe,David Etheridge	53
5	The atmospheric cycling of radiomethane and the "fossil fraction" of the methane source 2007 ·Atmospheric chemistry and physics ·Keith R. Lassey,Dave Lowe,Andrew Smith	55
6	Measurement of methane emission from sheep by the sulphur hexafluoride tracer technique and by the calorimetric chamber: failure and success 2007 ·animal ·C.S. Pinares-Patiño,C. W. Holmes,Keith R. Lassey,M. J. Ulyatt	38
7	Centennial evolution of the atmospheric methane budget: what do the carbon isotopes tell us? 2007 ·Atmospheric chemistry and physics ·Keith R. Lassey,David Etheridge,David C. Lowe,Andrew Smith,D. F. Ferretti	61
8	Methane emission from sheep grazing four pastures in late summer in New Zealand 2005 ·New Zealand Journal of Agricultural Research ·M. J. Ulyatt,Keith R. Lassey,I. D. Shelton,Carolyn F. Walker	29
9	Methane emission by alpaca and sheep fed on lucerne hay or grazed on pastures of perennial ryegrass/white clover or birdsfoot trefoil 2003 ·The Journal of Agricultural Science ·C.S. Pinares-Patiño,M. J. Ulyatt,G. C. Waghorn,Keith R. Lassey,T. N. Barry,C. W. Holmes,Donald E. Johnson	76
10	Seasonal variation in methane emission from dairy cows and breeding ewes grazing ryegrass/white clover pasture in New Zealand 2002 ·New Zealand Journal of Agricultural Research ·M. J. Ulyatt,Keith R. Lassey,I. D. Shelton,Carolyn F. Walker	58
11	Does feeding sulla (Hedysarum coronarium) reduce methane emissions from dairy cows 2002 ·Proceedings of the New Zealand Society of Animal Production ·Woodward Sl,Waghorn Gc,Keith R. Lassey,(unknown)	70
12	Methane emission from dairy cows and wether sheep fed subtropical grass‐dominant pastures in midsummer in New Zealand 2002 ·New Zealand Journal of Agricultural Research ·M. J. Ulyatt,Keith R. Lassey,I. D. Shelton,Carolyn F. Walker	65
13	Methane emissions from pastoral systems: the situation in New Zealand 2001 ·Archivos Latinoamericanos de Producción Animal ·M. J. Ulyatt,Keith R. Lassey	14
14	Early indications that feeding Lotus will reduce methane emissions from ruminants 2001 ·Proceedings of the New Zealand Society of Animal Production ·Woodward Sl,Waghorn Gc,Ulyatt Mj,Keith R. Lassey	141
15	Methane emission from grazing sheep and cattle 1997 ·Proceedings of the New Zealand Society of Animal Production ·Ulyatt Mj,Keith R. Lassey,Martin Rj,(unknown),(unknown)	11
16	Methane emissions measured directly from grazing livestock in New Zealand 1997 ·Atmospheric Environment ·Keith R. Lassey,M. J. Ulyatt,Ross J. Martin,Carolyn F. Walker,I. D. Shelton	150
17	Atmospheric methane in the southern hemisphere: The recent decline in source strengths inferred from concentration and isotope data 1994 ·OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) ·Keith R. Lassey,David C. Lowe,Gordon Brailsford,Antony Gomez,C. A. M. Brenninkmeijer,Martin Manning,(unknown)	3
18	On the computation of certain integrals containing the modified Bessel function 𝐼₀(𝜉) 1982 ·Mathematics of Computation ·Keith R. Lassey	19
19	Parity-nonconserving effects in the reaction n+p → d+γ 1974 ·Lettere al nuovo cimento della societa italiana di fisica/Lettere al nuovo cimento ·Keith R. Lassey,Bruce H. J. McKellar	14
20	The Jastrow wave function and the N-body cluster problem in nuclear matter 1971 ·Nuclear Physics A ·Keith R. Lassey,D. W. L. Sprung	14

About Keith R. Lassey

Keith R. Lassey is a scholar working on Process Chemistry and Technology, Environmental Chemistry and Agronomy and Crop Science, having authored 77 papers that have together received 3.2k indexed citations. Recurring topics across this work include Atmospheric and Environmental Gas Dynamics (29 papers), Ruminant Nutrition and Digestive Physiology (20 papers) and Methane Hydrates and Related Phenomena (17 papers). The work is most often cited by research in Agronomy and Crop Science (1.1k citations), Process Chemistry and Technology (240 citations) and Global and Planetary Change (1.2k citations). Keith R. Lassey has collaborated with scholars based in New Zealand, Australia and United States. Frequent co-authors include M. J. Ulyatt, David C. Lowe, Carolyn F. Walker, I. D. Shelton, C.S. Pinares-Patiño, Peter Blattner, C. W. Holmes, T. N. Barry, Woodward Sl and Waghorn Gc. Their work appears in journals such as Science, Journal of Geophysical Research Atmospheres and Geochimica et Cosmochimica Acta.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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