Global catalog of soil moisture droughts over the past four decades

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F25%3A00637973" target="_blank" >RIV/86652079:_____/25:00637973 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41330/25:102105 RIV/00020711:_____/25:10155329 RIV/00216224:14310/25:00141784 RIV/62156489:43210/25:43927330

Result on the web

<a href="https://hess.copernicus.org/articles/29/3341/2025/" target="_blank" >https://hess.copernicus.org/articles/29/3341/2025/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/hess-29-3341-2025" target="_blank" >10.5194/hess-29-3341-2025</a>

Result language

angličtina

Original language name

Global catalog of soil moisture droughts over the past four decades

Original language description

At the global scale, droughts can be described by many variables, expressing their extent, duration, dynamics, and severity. To identify common features in global land drought events (GLDEs) based on soil moisture, we present a robust method for their identification and classification (cataloging). Gridded estimates of root-zone soil moisture from the SoilClim model and the mesoscale Hydrologic Model (mHM) were calculated over global land from 1980-2022. Using the 10th-percentile thresholds of soil moisture anomalies and OPTICS clustering of the gridded data in a 10 d interval, a total of 775 GLDEs from SoilClim and 630 GLDEs from mHM were identified. By utilizing four spatiotemporal and three motion-related characteristics for each GLDE, we established threshold percentiles based on their distributions. This information enabled us to categorize droughts into seven severity categories (ranging from extremely weak to extremely severe) and seven dynamic categories (ranging from extremely static to extremely dynamic). Our global-scale synthesis revealed the highest relative proportions of extremely severe and extremely dynamic GLDEs in the South American region, followed by North America, while the longest and most extensive single GLDEs occurred in Eurasia. The severity and dynamic categories overlapped substantially for extremely severe and extremely dynamic droughts but very little for less severe/dynamic categories, despite some very small droughts that were occasionally very dynamic. The frequency of GLDEs has generally increased in recent decades across different drought categories but is statistically significant only in some cases. Overall, the cataloging of GLDEs presents a unique opportunity to analyze the evolving features of spatiotemporally connected drought events in recent decades and provides a basis for future investigations of the drivers and impacts of dynamically evolving drought events.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10501 - Hydrology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Hydrology and Earth System Sciences

ISSN

1027-5606

e-ISSN

1607-7938

Volume of the periodical

29

Issue of the periodical within the volume

14

Country of publishing house

DE - GERMANY

Number of pages

18

Pages from-to

3341-3358

UT code for WoS article

001540089000001

EID of the result in the Scopus database

2-s2.0-105017231249