Global Research Trends and Hotspots on Submarine Groundwater Discharge (SGD): A Bibliometric Analysis

Abstract

Submarine groundwater discharge (SGD), a major component of the hydrological cycle, has significant impacts on the sustainable development of the marine environment. This study aimed to examine the literature characteristics and research hotspots of SGD based on Web of Science’s citation database from 1998–2019. With systematic bibliometric analysis, insights were made into multiple aspects including research output, subject categories, journals, countries/territories, institutions, authors, and hotspots and research trends. Results showed that the current amount of publications on SGD has increased exponentially. The characteristics of multi-subject, active international and inter-institutional collaborations were identified. There were 11 core journals publishing the research on SGD, and the number of covered journals increased linearly from 1998. USA had distinct advantages in publication outputs and took the core position in international collaborations. At present, the research hotspots of SGD mainly include the following: dynamics process and estimation of SGD with hydrogeological methods, tracer techniques, geochemical process in subterranean estuary, and dissolved material inputs to coastal waters via SGD. Citation analysis implied much development space in carbon flux transported by SGD and the implement of head as groundwater tracer. These results provided an instructive perspective of the present situation and future research direction on SGD.

Molecular Traits of Dissolved Organic Matter in the Subterranean Estuary of a High-Energy Beach: Indications of Sources and Sinks

“…Since the turn of the millennium, the steadily growing recognition of STEs as global, ubiquitous land-ocean interfaces (Ma and Zhang, 2020) has led to a wealth of investigations (e.g., Charette and Sholkovitz, 2006;Robinson et al, 2006;Santos et al, 2009;Roy et al, 2010;Kim et al, 2012;Beck et al, 2017). In particular, the topic of sources and fate of organic matter in STEs has received increasing attention in the past decade, as organic matter is the fuel that drives the STE microbial biogeochemical reactor.…”

Informetric Analysis of Highly Cited Papers in Environmental Sciences Based on Essential Science Indicators

“…Many indicators were applied to assess the scientific performance, including publication indicators (such as the number of publications, publication share), citation indicators (such as total citations, citations per paper, H-index, percentage of papers receiving at least one citation), and journal indicators (such as the impact factor, JIF Quartile, Immediacy Index). Analysis of keywords has been widely used to identify hotspots and research trends in recent years [19][20][21]. VOSviewer, a visualization software, was utilized to construct the collaboration network and perform the co-word cluster analysis [22].…”

Socioeconomic Effects in Cyberbullying: Global Research Trends in the Educational Context

“…For these reasons, in the last phase (included), the final sample is collected with 1128 articles. Essentially, the search selected records from the subfields title, abstract and keywords, in the period that contains the publication of the first article on the research topic (2004) until the last full year (2019), that is, a period of 16 years has been analysed, in the same way that it has been applied successfully in various works that have used bibliometric methodology [91][92][93]. The representation of this sample of articles is supported by the proven quality of the Scopus database, regarding the indexing protocol, in addition to the systematic procedures of the search criteria.…”