A. C. Barker

1.3k total citations · 1 hit paper
17 papers, 1.1k citations indexed

About

A. C. Barker is a scholar working on Organic Chemistry, Atmospheric Science and Global and Planetary Change. According to data from OpenAlex, A. C. Barker has authored 17 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 8 papers in Organic Chemistry, 7 papers in Atmospheric Science and 7 papers in Global and Planetary Change. Recurrent topics in A. C. Barker's work include Tree-ring climate responses (7 papers), Plant Water Relations and Carbon Dynamics (7 papers) and Geology and Paleoclimatology Research (5 papers). A. C. Barker is often cited by papers focused on Tree-ring climate responses (7 papers), Plant Water Relations and Carbon Dynamics (7 papers) and Geology and Paleoclimatology Research (5 papers). A. C. Barker collaborates with scholars based in United Kingdom, South Africa and Russia. A. C. Barker's co-authors include J. Waterhouse, V. R. Switsur, Iain Robertson, Neil J. Loader, Deborah Hemming, P. D. Jones, Keith R. Briffa, James Rolfe, Alan R. Battersby and Robert G. Aykroyd and has published in prestigious journals such as Journal of Geophysical Research Atmospheres, Earth and Planetary Science Letters and Geophysical Research Letters.

In The Last Decade

A. C. Barker

17 papers receiving 1.0k 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.

An improved technique for the batch processing of small wholewood samples to α-cellulose

1997 432 citations Neil J. Loader, Iain Robertson et al. Chemical Geology profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
A. C. Barker United Kingdom	11	886	775	170	121	90	17	1.1k
Naomi Kodama Japan	11	270 0.3×	533 0.7×	420 2.5×	76 0.6×	68 0.8×	14	707
Jim Gillon United Kingdom	7	159 0.2×	476 0.6×	316 1.9×	16 0.1×	58 0.6×	10	614
John R. Gittins United Kingdom	10	85 0.1×	197 0.3×	94 0.6×	13 0.1×	247 2.7×	15	862
Marc‐André Cormier United Kingdom	9	167 0.2×	107 0.1×	67 0.4×	12 0.1×	90 1.0×	11	325
Rachael S. Shreeve United Kingdom	20	70 0.1×	618 0.8×	8 0.0×	188 1.6×	481 5.3×	32	1.1k
Haoran Zhou China	12	80 0.1×	147 0.2×	266 1.6×	29 0.2×	55 0.6×	27	506
Adriana L. Carnelli Switzerland	7	195 0.2×	49 0.1×	244 1.4×	21 0.2×	29 0.3×	8	371
T. A. Probyn South Africa	17	54 0.1×	337 0.4×	43 0.3×	59 0.5×	325 3.6×	32	946
A. Wolf Germany	14	831 0.9×	441 0.6×	582 3.4×	13 0.1×	102 1.1×	19	1.1k
Gary Maillet Canada	9	59 0.1×	240 0.3×	26 0.2×	127 1.0×	268 3.0×	12	733

Countries citing papers authored by A. C. Barker

Since Specialization

Citations

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

Fields of papers citing papers by A. C. Barker

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. C. Barker. 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 A. C. Barker. The network helps show where A. C. Barker may publish in the future.

Co-authorship network of co-authors of A. C. Barker

This figure shows the co-authorship network connecting the top 25 collaborators of A. C. Barker. A scholar is included among the top collaborators of A. C. Barker 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 A. C. Barker. A. C. Barker is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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17 of 17 papers shown

Waterhouse, J., V. R. Switsur, A. C. Barker, et al.. (2004). Northern European trees show a progressively diminishing response to increasing atmospheric carbon dioxide concentrations. Quaternary Science Reviews. 23(7-8). 803–810. 131 indexed citations

Waterhouse, J., et al.. (2002). Oxygen and hydrogen isotope ratios in tree rings: how well do models predict observed values?. Earth and Planetary Science Letters. 201(2). 421–430. 98 indexed citations

Robertson, Iain, et al.. (2001). Oxygen isotope ratios of oak in east England: implications for reconstructing the isotopic composition of precipitation. Earth and Planetary Science Letters. 191(1-2). 21–31. 97 indexed citations

Waterhouse, J., et al.. (2000). Stable carbon isotopes in scots pine tree rings preserve a record of flow of the river Ob. Geophysical Research Letters. 27(21). 3529–3532. 13 indexed citations

Robertson, Iain, D. Lucy, Louise Baxter, et al.. (1999). A kernel-based Bayesian approach to climatic reconstruction. The Holocene. 9(4). 495–500. 27 indexed citations

Barker, A. C., et al.. (1999). Application of Oxathiazolidine-S-oxide Chemistry to the Large-Scale Single-Step Synthesis of an O-Arylethanolamine. Organic Process Research & Development. 3(4). 253–255. 2 indexed citations

Barker, A. C., et al.. (1998). Biosynthesis. Part 28.1,2 Colchicine: definition of intermediates between O-methylandrocymbine and colchicine and studies on speciosine. Journal of the Chemical Society Perkin Transactions 1. 2989–2994. 8 indexed citations

Sheldrake, Peter, Keith E. Suckling, Richard B. Herbert, et al.. (1998). Biosynthesis. Part 30.1 Colchicine: studies on the ring expansion step focusing on the fate of the hydrogens at C-4 of autumnaline. Journal of the Chemical Society Perkin Transactions 1. 3003–3010. 15 indexed citations

Robertson, Iain, V. R. Switsur, A. C. Barker, et al.. (1997). Signal strength and climate relationships in ¹³C/¹²C ratios of tree ring cellulose from oak in east England. Journal of Geophysical Research Atmospheres. 102(D16). 19507–19516. 115 indexed citations

10.

Loader, Neil J., Iain Robertson, A. C. Barker, V. R. Switsur, & J. Waterhouse. (1997). An improved technique for the batch processing of small wholewood samples to α-cellulose. Chemical Geology. 136(3-4). 313–317. 432 indexed citations breakdown →

11.

Robertson, Iain, et al.. (1997). Signal strength and climate relationships in ¹³C/¹²C ratios of tree ring cellulose from oak in southwest Finland. Geophysical Research Letters. 24(12). 1487–1490. 81 indexed citations

12.

Barker, A. C. & Alan R. Battersby. (1967). The absolute configuration of (-)-argemonine. Tetrahedron Letters. 8(2). 135–136. 4 indexed citations

13.

Barker, A. C. & Alan R. Battersby. (1967). Synthesis of (±)-eschscholtzine. The absolute configuration of (–)-argemonine, (–)-eschscholtzine, and related alkaloids. Journal of the Chemical Society C Organic. 0(0). 1317–1323. 4 indexed citations

14.

Barker, A. C., Alan R. Battersby, Edward McDonald, R. Ramage, & John H. Clements. (1967). Biosynthesis of colchicine: ring expansion and later stages. Structure of speciosine. Chemical Communications (London). 390b–390b. 5 indexed citations

15.

Barker, A. C., et al.. (1954). 3 : 6-Disubstituted fluorenes. Part II. The preparation of 3 : 6-diaminofluorene from fluorene, and the attempted internuclear cyclisation of derivatives of 4 : 4′-diaminodiphenylmethane. Journal of the Chemical Society (Resumed). 0(0). 870–873. 13 indexed citations

16.

Barker, A. C., et al.. (1954). 3 : 6-Disubstituted fluorenes. Part III. Fluorene analogues of Michler's hydrol, malachite-green, and crystal-violet. Journal of the Chemical Society (Resumed). 1307–1307. 13 indexed citations

17.

Barker, A. C., et al.. (1953). 414. 3 : 6-Disubstituted fluorenes. Part I. The attempted introduction of a 6 : 6′-methylene bridge directly into 3 : 3′-diaminodiphenyl and some of its derivatives. Journal of the Chemical Society (Resumed). 0(0). 2034–2036. 1 indexed citations

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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