干旱区生态环境知识资源中心(Arid): Semi-Arid to Arid Scenario Shift: Is the Cabrobó Desertification Nucleus Becoming Arid?

Arid

DOI	10.3390/rs16152834
	Semi-Arid to Arid Scenario Shift: Is the Cabrobó Desertification Nucleus Becoming Arid?
	da Silva, Jose Lucas Pereira; da Silva Junior, Francisco Bento; Santos, Joao Pedro Alves de Souza; Almeida, Alexsandro Claudio dos Santos; da Silva, Thieres George Freire; de Oliveira-Junior, Jose Francisco; Araujo Junior, George do Nascimento; Scheibel, Christopher Horvath; da Silva, Jhon Lennon Bezerra; de Lima, Joao Luis Mendes Pedroso; da Silva, Marcos Vinicius
通讯作者	da Silva, MV
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2024
卷号	16 期号:15
英文摘要	Monitoring areas susceptible to desertification contributes to the strategic development of regions located in environments of extreme hydric and social vulnerability. Therefore, the objective of this study is to evaluate the process of soil degradation in the Desertification Nucleus of Cabrob & oacute; (DNC) over the past three decades using remote sensing techniques. This study used primary climatic data from TerraClimate, geospatial data of land use and land cover (LULC), and vegetation indices (SAVI and LAI) via Google Earth Engine (GEE) from Landsat 5/TM and 8/OLI satellites, and established the aridity index (AI) from 1992 to 2022. The results indicated 10 predominant LULC classes with native vegetation suppression, particularly in agriculture and urbanization. SAVI ranged from -0.84 to 0.90, with high values influenced by La Ni & ntilde;a episodes and increased rainfall; conversely, El Ni & ntilde;o episodes worsened the rainfall regime in the DNC region. Based on the Standardized Precipitation Index (SPI), it was possible to correlate normal and severe drought events in the DNC with years under the influence of El Ni & ntilde;o and La Ni & ntilde;a phases. In summary, the AI images indicated that the DNC remained semi-arid and that the transition to an arid region is a cyclical and low-frequency phenomenon, occurring in specific periods and directly influenced by El Ni & ntilde;o and La Ni & ntilde;a phenomena. The Mann-Kendall analysis showed no increasing trend in AI, with a Tau of -0.01 and a p-value of 0.97. During the analyzed period, there was an increase in Non-Vegetated Areas, which showed a growing trend with a Tau of 0.42 in the Mann-Kendall analysis, representing exposed soil areas. Annual meteorological conditions remained within the climatic pattern of the region, with annual averages of precipitation and actual evapotranspiration (ETa) close to 450 mm and an average temperature of 24 degrees C, showing changes only during El Ni & ntilde;o and La Ni & ntilde;a events, and did not show significant increasing or decreasing trends in the Mann-Kendall analysis.
英文关键词	land use and land cover aridity index standardized precipitation index (SPI) native vegetation suppression
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001287250000001
WOS关键词	CLIMATE-CHANGE ; RAINFALL VARIABILITY ; DROUGHT ; BRAZIL
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405316
推荐引用方式 GB/T 7714	da Silva, Jose Lucas Pereira,da Silva Junior, Francisco Bento,Santos, Joao Pedro Alves de Souza,et al. Semi-Arid to Arid Scenario Shift: Is the Cabrobó Desertification Nucleus Becoming Arid?[J],2024,16(15).
APA	da Silva, Jose Lucas Pereira.,da Silva Junior, Francisco Bento.,Santos, Joao Pedro Alves de Souza.,Almeida, Alexsandro Claudio dos Santos.,da Silva, Thieres George Freire.,...&da Silva, Marcos Vinicius.(2024).Semi-Arid to Arid Scenario Shift: Is the Cabrobó Desertification Nucleus Becoming Arid?.REMOTE SENSING,16(15).
MLA	da Silva, Jose Lucas Pereira,et al."Semi-Arid to Arid Scenario Shift: Is the Cabrobó Desertification Nucleus Becoming Arid?".REMOTE SENSING 16.15(2024).