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Topic · Geochemistry and Petrology

Groundwater and Isotope Geochemistry

Groundwater and Isotope Geochemistry is a research topic within Geochemistry and Petrology. Science Explorer counts 31k research works in it since 1950. 10.0% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the stable isotopic analysis of groundwater and precipitation, including the use of isotopes to study nitrate contamination, groundwater recharge, climate change impacts, and water quality. It also addresses global depletion of groundwater resources and hydrogeochemical processes influencing groundwater composition.

  • Groundwater
  • Isotopes
  • Stable
  • Precipitation
  • Nitrate
  • Recharge
  • Climate Change
  • Water Quality
  • Hydrogeochemical Processes
  • Global Depletion
Research works
31k
fractional, since 1950
In the world top 10%
3.2k
per year above
Top-10% rate
10.0%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+5%
the tick is no change
Largest producer
China
36% of the 10 largest, 2022-now
Groundwater and Isotope Geochemistry

Which countries lead Groundwater and Isotope Geochemistry research?

By volume, China and India publish the most (1.6k and 920 works in 2022-now).

By volume, 2022-now

  1. 1 China 1.6k works
  2. 2 India 920 works
  3. 3 United States 697 works
  4. 4 Germany 192 works
  5. 5 France 183 works
  6. 6 Nigeria 180 works
  7. 7 Egypt 142 works
  8. 8 Italy 142 works
  9. 9 Iran 135 works
  10. 10 Japan 133 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

China: 36.4%India: 21.5%United States: 16.3%Germany: 4.5%6 others listed: 21.4%36%largest
China1,558 · 36.4%India920 · 21.5%United States697 · 16.3%Germany192 · 4.5%6 others listed915 · 21.4%

Shares of the rows listed above, not of the whole node.

Which institutions lead Groundwater and Isotope Geochemistry research?

By volume in 2022-now, Chinese Academy of Sciences publishes the most Groundwater and Isotope Geochemistry research, followed by Centre National de la Recherche Scientifique and China University of Geosciences.

By volume, 2022-now

  1. 1 Chinese Academy of SciencesChina 178 works
  2. 2 Centre National de la Recherche ScientifiqueFrance 76 works
  3. 3 China University of GeosciencesChina 70 works
  4. 4 China University of Geosciences (Beijing)China 60 works
  5. 5 Hohai UniversityChina 48 works
  6. 6 United States Geological SurveyUnited States 43 works
  7. 7 China Geological SurveyChina 43 works
  8. 8 Chinese Academy of Geological SciencesChina 41 works
  9. 9 Helmholtz Association of German Research CentresGermany 38 works
  10. 10 University of Chinese Academy of SciencesChina 33 works

Who are the leading researchers in Groundwater and Isotope Geochemistry?

The most-cited researchers publishing on Groundwater and Isotope Geochemistry include Michaël Grätzel, Philippe Ciais and Kai You Wang.

  1. 1 Michaël Grätzel Switzerland 458k citations
  2. 2 Philippe Ciais France 237k citations
  3. 3 Kai You Wang China 224k citations
  4. 4 Guangming Zeng China 204k citations
  5. 5 Hung Chak Ho China 180k citations
  6. 6 Vivekanand Jha India 180k citations
  7. 7 Noah Fierer United States 175k citations
  8. 8 Josep Peñuelas Spain 160k citations
  9. 9 Carlos Manuel Duarte Saudi Arabia 152k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Groundwater and Isotope Geochemistry?

The most cited paper in Groundwater and Isotope Geochemistry is "Isotopic Variations in Meteoric Waters" (Harmon Craig, 1961), with 8,926 citations. Next come "Stable isotopes in precipitation" (8,441) and "Nitrogen Cycles: Past, Present, and Future" (5,486).

Most cited papers
#PaperReleasedCitations
1 Isotopic Variations in Meteoric Waters Harmon Craig · Science 26 May 1961 8,926
2 Stable isotopes in precipitation W. Dansgaard · Tellus Nov 1964 8,441
3 Nitrogen Cycles: Past, Present, and Future James N. Galloway, Frank J. Dentener, Douglas G. Capone et al. · Biogeochemistry Sep 2004 5,486
4 Mechanisms Controlling World Water Chemistry Ronald J. Gibbs · Science 4 Dec 1970 4,496
5 Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide Harmon Craig · Geochimica et Cosmochimica Acta 1957 4,237
All 98 most cited papers, with filters and sorting

Where is Groundwater and Isotope Geochemistry research done?

The largest centres of Groundwater and Isotope Geochemistry research in 2022-now are Beijing (China), Wuhan (China), Nanjing (China) and Xi'an (China). Among places with at least 20 works in it, it is an unusually large share of all research in Reston.

Largest cities, 2022-now

  1. 1 BeijingChina 483 works
  2. 2 WuhanChina 105 works
  3. 3 NanjingChina 102 works
  4. 4 Xi'anChina 70 works
  5. 5 ParisFrance 62 works
  6. 6 QingdaoChina 56 works
  7. 7 New DelhiIndia 55 works
  8. 8 CairoEgypt 50 works
  9. 9 ChennaiIndia 47 works
  10. 10 TehranIran 46 works

Where it is the local speciality

  1. RestonUS · 34.3 works23×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Groundwater and Isotope Geochemistry than the world average.

See Groundwater and Isotope Geochemistry on the map

Where is the best place to study Groundwater and Isotope Geochemistry?

Among universities, judged by research, China University of Geosciences (Beijing), China University of Geosciences and Chang'an University score highest, combining excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%20%40%mean 20.26%fractional works in this field (log) →share of work in the world top 10% →Chang'an UniversityChina University of …China University of …Hohai University
above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1China University of Geosciences (Beijing)China 73.020.9%35.4×60 +30.4%
2China University of GeosciencesChina 71.616.2%26.3×70 +37.4%
3Chang'an UniversityChina 70.527.6%13.9×30 -24.1%
4Hohai UniversityChina 59.413.4%14.0×48 +16.1%
5Southwest Jiaotong UniversityChina 59.030.0%3.0×14 +78.4%
6King Saud UniversitySaudi Arabia 52.821.1%2.8×16 +94.3%
7Inner Mongolia UniversityChina 50.028.9%6.6×8 +571.4%
8Ocean University of ChinaChina 49.518.2%5.0×15 +41.9%
9King Fahd University of Petroleum and MineralsSaudi Arabia 49.315.0%7.3×15 +318.2%
10Shandong University of Science and TechnologyChina 48.711.3%7.3×21 +59.7%

Universities only. The score blends excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Groundwater and Isotope Geochemistry, country by country

Is Groundwater and Isotope Geochemistry research growing?

Output in 2022-2025 was 5% higher than in 2018-2021, peaking in 2020. The fastest-growing topics are Groundwater and Isotope Geochemistry.

still counting19801990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Groundwater and Isotope Geochemistry as a percentage of every work published that year, 0.026% in 2024.

still counting0.020%0.040%Groundwater and Isotope Geochemistry0.026% in 202519801990200020102020

Fractional works of Groundwater and Isotope Geochemistry over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Groundwater and Isotope Geochemistry10.0% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

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