D. O’Brien

1.7k total citations
36 papers, 1.3k citations indexed

About

D. O’Brien is a scholar working on Ecology, Environmental Engineering and Process Chemistry and Technology. According to data from OpenAlex, D. O’Brien has authored 36 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Ecology, 20 papers in Environmental Engineering and 6 papers in Process Chemistry and Technology. Recurrent topics in D. O’Brien's work include Agriculture Sustainability and Environmental Impact (34 papers), Environmental Impact and Sustainability (20 papers) and Odor and Emission Control Technologies (6 papers). D. O’Brien is often cited by papers focused on Agriculture Sustainability and Environmental Impact (34 papers), Environmental Impact and Sustainability (20 papers) and Odor and Emission Control Technologies (6 papers). D. O’Brien collaborates with scholars based in Ireland, Germany and France. D. O’Brien's co-authors include L. Shalloo, C. Grainger, Michael Wallace, P. Crosson, Gary Lanigan, Brian Moran, T.M. Boland, J. Patton, D.A. Kenny and P.A. Foley and has published in prestigious journals such as Journal of Cleaner Production, Journal of Dairy Science and Journal of Environmental Management.

In The Last Decade

D. O’Brien

35 papers receiving 1.3k citations

Peers

Countries citing papers authored by D. O’Brien

Since Specialization

Citations

This map shows the geographic impact of D. O’Brien'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 D. O’Brien with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites D. O’Brien more than expected).

Fields of papers citing papers by D. O’Brien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by D. O’Brien. 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 D. O’Brien. The network helps show where D. O’Brien may publish in the future.

Co-authorship network of co-authors of D. O’Brien

This figure shows the co-authorship network connecting the top 25 collaborators of D. O’Brien. A scholar is included among the top collaborators of D. O’Brien 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 D. O’Brien. D. O’Brien 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	Simulation of management practices to reduce nitrogen losses to water and air on well-drained grass-based dairy farms in derogation 2025 ·Journal of Dairy Science ·(unknown), N. B. Basu, D. O’Brien, Cathal Buckley, B. Horan, Karl G. Richards, Owen Fenton	0
2	A life cycle assessment model of Irish grain cropping systems focused on carbon footprint 2025 ·Irish Journal of Agricultural and Food Research ·D. O’Brien, Gary Lanigan, (unknown), (unknown), (unknown), (unknown), John Spink	1
3	Mitigation of gaseous emissions from dairy livestock: A farm-level method to examine the financial implications 2024 ·Journal of Environmental Management ·(unknown), Thia Hennessy, Barbara Amon, Federico Dragoni, D. O’Brien	6
4	Environmental impact of grass-based cattle farms: A life cycle assessment of nature-based diversification scenarios 2023 ·Resources Environment and Sustainability ·D. O’Brien, Maria Markiewicz‐Kęszycka, (unknown)	21
5	Decision Support Systems Based on Gaseous Emissions and Their Impact on the Sustainability Assessment at the Livestock Farm Level: An Evaluation from the User’s Side 2023 ·Sustainability ·(unknown), (unknown), Federico Dragoni, (unknown), (unknown), D. O’Brien, Barbara Amon, Thomas Bartzanas	4
6	Life cycle assessment of pasture-based dairy production systems: Current and future performance 2022 ·Journal of Dairy Science ·(unknown), D. O’Brien, L. Shalloo	32
7	Pro-environmental diversification of pasture-based dairy and beef production in Ireland, the United Kingdom and New Zealand: a scoping review of impacts and challenges 2022 ·Renewable Agriculture and Food Systems ·Maria Markiewicz‐Kęszycka, (unknown), D. O’Brien, Maeve Henchion, (unknown), Paul Hynds	10
8	The simulated environmental impact of incorporating white clover into pasture-based dairy production systems 2021 ·Journal of Dairy Science ·(unknown), D. Hennessy, Thomas P. Curran, A.P. Moloney, D. O’Brien	24
9	Greenhouse gas emissions and nitrogen efficiency of dairy cows of divergent economic breeding index under seasonal pasture-based management 2021 ·Journal of Dairy Science ·(unknown), L. Shalloo, (unknown), D. O’Brien, (unknown), T.M. Boland, F. Buckley	18
10	Life cycle assessment of pasture-based suckler steer weanling-to-beef production systems: Effect of breed and slaughter age 2021 ·animal ·(unknown), Thomas P. Curran, A.P. Moloney, M. McGee, E.G. O’Riordan, D. O’Brien	28
11	LIFE BEEF CARBON: a common framework for quantifying grass and corn based beef farms’ carbon footprints 2019 ·animal ·D. O’Brien, (unknown), (unknown), (unknown), Pedro Martı́nez, (unknown), (unknown), G. Pirlo, (unknown)	20
12	A national methodology to quantify the diet of grazing dairy cows 2018 ·Journal of Dairy Science ·D. O’Brien, Brian Moran, (unknown)	59
13	Evaluation of allocation methods for calculation of carbon footprint of grass-based dairy production 2017 ·Journal of Environmental Management ·(unknown), D. O’Brien, L. Shalloo, Nicholas M. Holden	40
14	Water footprinting of pasture-based farms; beef and sheep 2017 ·animal ·Eoin G. Murphy, Thomas P. Curran, Nicholas M. Holden, D. O’Brien, John Upton	9
15	How can grass-based dairy farmers reduce the carbon footprint of milk? 2016 ·Animal Production Science ·D. O’Brien, A. Geoghegan, (unknown), L. Shalloo	21
16	Relating the carbon footprint of milk from Irish dairy farms to economic performance 2015 ·Journal of Dairy Science ·D. O’Brien, Thia Hennessy, Brian Moran, L. Shalloo	72
17	An appraisal of carbon footprint of milk from commercial grass-based dairy farms in Ireland according to a certified life cycle assessment methodology 2014 ·The International Journal of Life Cycle Assessment ·D. O’Brien, (unknown), J. Humphreys, (unknown), L. Shalloo	58
18	A case study of the carbon footprint of milk from high-performing confinement and grass-based dairy farms 2014 ·Journal of Dairy Science ·D. O’Brien, Judith L. Capper, P. C. Garnsworthy, C. Grainger, L. Shalloo	116
19	The Carbon Navigator: a decision support tool to reduce greenhouse gas emissions from livestock production systems 2013 ·animal ·Paul Murphy, P. Crosson, D. O’Brien, Rogier P.O. Schulte	27
20	Evaluation of the effect of accounting method, IPCC v. LCA, on grass-based and confinement dairy systems’ greenhouse gas emissions 2012 ·animal ·D. O’Brien, L. Shalloo, J. Patton, F. Buckley, C. Grainger, Michael Wallace	53

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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