Aeolian Geomorphic Response to Climate Change: An Example from the Estancia Valley, Central New Mexico, USA

Catto, Norm; Bachhuber, F. W.

doi:10.1007/0-306-48086-7_9

Cited by 6 publications

(5 citation statements)

References 33 publications

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“…The lower reach of the basin experiences a hyper-arid climate, the middle reach is characterized as semi-arid, and the alpine zones of the southern Qilian Mountains exhibit a semi-humid climate at higher altitudes. These findings further support existing studies that emphasize the profound influence of climate patterns and topographic features on the spatial heterogeneity of ecosystem conditions throughout the basin [97][98][99][100][101][102][103][104][105][106][107][108][109][110][111].…”

Section: Discussionsupporting

confidence: 89%

Quantitative Analysis of Desertification-Driving Mechanisms in the Shiyang River Basin: Examining Interactive Effects of Key Factors through the Geographic Detector Model

et al. 2023

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Desertification is a global eco-environmental hazard exacerbated by environmental and anthropogenic factors. However, comprehensive quantification of each driving factor’s relative impact poses significant challenges and remains poorly understood. The present research applied a GIS-based and geographic detector model to quantitatively analyze interactive effects between environmental and anthropogenic factors on desertification in the Shiyang River Basin. A MODIS-based aridity index was used as a dependent variable, while elevation, near-surface air temperature, precipitation, wind velocity, land cover change, soil salinity, road buffers, waterway buffers, and soil types were independent variables for the GeoDetector model. A trend analysis revealed increased aridity in the central parts of the middle reach and most parts of the Minqin oasis and a significant decrease in some regions where ecological rehabilitation projects are underway. The GeoDetector model yielded a power determinant (q) ranging from 0.004 to 0.270, revealing elevation and soil types as the region’s highest contributing factors to desertification. Precipitation, soil salinity, waterway buffer, and wind velocity contributed moderately, while near-surface air temperature, road buffer, and land cover dynamics exhibited a lower impact. In addition, the interaction between driving factors often resulted in mutual or non-linear enhancements, thus aggravating desertification impacts. The prominent linear and mutual enhancement occurred between elevation and soil salinity and between elevation and precipitation. On the other hand, the results exhibited a non-linear enhancement among diverse variables, namely, near-surface air temperature and elevation, soil types and precipitation, and land cover dynamics and soil types, as well as between wind velocity and land cover dynamics. These findings suggest that environmental factors are the primary drivers of desertification and highlight the region’s need for sustainable policy interventions.

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Section: Discussionsupporting

confidence: 89%

Quantitative Analysis of Desertification-Driving Mechanisms in the Shiyang River Basin: Examining Interactive Effects of Key Factors through the Geographic Detector Model

et al. 2023

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“…In addition, this suggests that topographic landforms and climate play a significant role in developing geomorphic features in the Shiyang River Basin. Similar findings corroborate previous studies on desertification, aeolian processes, and landforms' response to climate change [96,[111][112][113][114][115][116][117][118][119][120][121][122].…”

Section: Environmental Risk Detection Of Desertification In the Shiya...supporting

confidence: 92%

Quantitative analysis of desertification driving mechanisms in the Shiyang River Basin: Examining interactive effects of key factors through the Geographic Detector Model

Ngabire¹,

Wang²,

Lü³

et al. 2023

Preprint

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Desertification is a global environmental and socio-economical issue threatening humanity's survival and development. The Shiyang River Basin ecosystem is vulnerable and prone to desertification. In addition, establishing the quantitative analysis of desertification driving factors and understanding their relative contribution, separately or combined, is still an unresolved problem. The present study applied geographic information system (GIS) techniques and a geographic detector model to quantify desertification spatial extent and driving mechanisms. This research utilized Fractional Vegetation Cover (FVC) to elucidate desertification spatial heterogeneity. The 30 years Coefficient of Variation (CV) of the Normalized Difference Vegetation Index (NDVI) was a dependent variable and indicator of ecosystem terrestrial conditions; Elevation, near-surface air temperature, precipitation, wind velocity, land cover change, soil salinity, road buffers, waterway buffers, and soil types were independent variables. The results showed that 89.41% of the total area is under desertification risk, where 20.99% is extremely desertified, 34.45% is severely desertified, 12.05% is moderately, and 21.92% is slightly desertified. The results from the Geodetector model showed that Power Determinant (PD) values ranged between 0.004 and 0.270. Elevation and soil types had the highest contributing factors with PD values of 0.270 and 0.227, whereas precipitation, soil salinity, the buffer of the waterway, and wind velocity played a moderate role with PD values of 0.146, 0.117, 0.107, and 0.071. Near-surface air temperature, road buffer, and land cover dynamics exhibited lower impact with PD values of 0.028, 0.013, and 0.004. In most cases, investigating the interaction between driving factors resulted in a mutual or non-linear enhancement. There was an apparent linear and mutual enhancement between elevation and soil salinity, precipitation, and soil types with values of 0.3513, 0.3232, and 0.3204, respectively. In addition, there was a mutual enhancement between soil salinity and soil types with a value of 0.2962. On the other hand, a non-linear enhancement was observed between Elevation and near-surface air temperature (0.3116), Elevation and Land cover dynamics (0.2759), soil types and near-surface air temperature (0.2687), land cover dynamics and soil types (0.234), precipitation and near-surface air temperature (0.2248), precipitation and wind velocity (0.2248), and between land cover dynamics and precipitation (0.223). This research revealed irrefutable evidence that environmental factors might be the primary drivers of ecosystem disturbance, provided the basis for the environmental footprint of desertification mechanism, and might be a cornerstone for future policy on ecological restoration sustainability in the Shiyang River Basin.

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“…Similar linear blowouts associated with anthropogenic disturbance have been recorded in many other dune complexes (e.g. Bowles 1980;Jungerius et al 1981, Jungerius 1984Phis 1992;Catto and Bachhuber 2000;Catto et a/. 2002).…”

Section: Blowout Characteristics and Developmentsupporting

confidence: 75%

Anthropogenic pressures on coastal dunes, southwestern Newfoundland

Catto¹

2002

Canadian Geographies / Géographies canadiennes

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Sand‐dominated coastlines backed by transverse foredunes, dome dunes, and parabolic dunes occur at several sites along the coastline of southwest Newfoundland, extending from Sandbanks Provincial Park (Burgeo) to Grand Bay West (Channel‐Port‐aux‐Basques) and north to J.T. Cheeseman Provincial Park. The coastal dunes developed during the mid‐Holocene in response to enhanced sediment availability and flux, coupled with effective sediment retention. Under present environmental conditions, development of aeolian dunes is hindered. Recent changes in the geomorphology of these coastlines provide evidence of the impact of anthropogenic activity. Differing time scales of both weather/climate events and landform response complicate interpretation. Anthropogenic modification, both intentional and accidental, represents a locally dominant geomorphic influence, and these dunes have evolved rapidly in response to anthropogenic pressure coupled with storm events. Changes in the southwest Newfoundland economy have led to increased interest in tourism, and consequent pressure on the sandy coastlines and backing dunes. Increased anthropogenic utilization of the coast for recreational purposes, both by residents and tourists, and limited offshore winter ice and onshore snow cover have resulted in accelerated erosion and degradation of the dunes and coastlines. The influx of sand from the beaches is insufficient to replace that removed through natural and anthropogenic causes. Consequently, the coastal dunes of southwest Newfoundland are essentially relict and will not regenerate following anthropogenic disturbance. On trouve à plusieurs endroits le long des côtes sud‐ouest de Terre‐Neuve, du parc provincial Sandbanks (Burgeo) à Grand Bay Ouest (Channel‐Port‐aux‐Basques) et vers le nord jusqu'au parc provincial J.T. Cheeseman, des littoraux à prédominance de dunes où se sont formées des avant‐dunes transversales, des dunes en forme de dôme et des dunes paraboliques. Les dunes maritimes sont apparues vers le milieu de l'ère holocène en réaction à la disponibilité accrue de sédiments et à leur flux alliés à leur rétention efficace. Ainsi, les conditions environnementales actuelles entravent la formation de dunes éoliennes. Des changements récents à la géomorphologie de ces littoraux fournissent la preuve que l'activité anthropique a des conséquences. Les événements météorologiques et climatiques ainsi que la réaction topographique étant reliés à des échelles de temps différentes, compliquent l'interprétation. Une modification anthropique, qu'elle soit intentionnelle ou accidentelle, constitue une influence géomorphologique locale dominante. Ces dunes ont évolué rapidement en raison de ces pressions anthropiques alliées à des événements pluvio‐hydrologiques. Des changements dans l'économie du sud‐ouest de Terre‐Neuve ont suscité un regain d'intérêt pour le tourisme, ce qui a eu pour effet de créer des pressions sur les littoraux sablonneux et les dunes. L'accroissement de l'utilisation du littoral à des fins récréatives, tant par les ...

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Aeolian Geomorphic Response to Climate Change: An Example from the Estancia Valley, Central New Mexico, USA

Cited by 6 publications

References 33 publications

Quantitative Analysis of Desertification-Driving Mechanisms in the Shiyang River Basin: Examining Interactive Effects of Key Factors through the Geographic Detector Model

Quantitative Analysis of Desertification-Driving Mechanisms in the Shiyang River Basin: Examining Interactive Effects of Key Factors through the Geographic Detector Model

Quantitative analysis of desertification driving mechanisms in the Shiyang River Basin: Examining interactive effects of key factors through the Geographic Detector Model

Anthropogenic pressures on coastal dunes, southwestern Newfoundland

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