1 Ocak 2020 Dergi makalesi Açık Erişim

Kumari, Nikul; Saco, Patricia M.; Rodriguez, Jose F.; Johnstone, Samuel A.; Srivastava, Ankur; Chun, Kwok P.; Yetemen, Omer

Citation Style Language JSON

{
  "DOI": "10.1029/2020GL088918", 
  "abstract": "Our current understanding of semiarid ecosystems is that they tend to display higher vegetation greenness on polar-facing slopes (PFS) than on equatorial-facing slopes (EFS). However, recent studies have argued that higher vegetation greenness can occur on EFS during part of the year. To assess whether this seasonal reversal of aspect-driven vegetation is a common occurrence, we conducted a global-scale analysis of vegetation greenness on a monthly time scale over an 18-year period (2000-2017). We examined the influence of climate seasonality on the normalized difference vegetation index (NDVI) values of PFS and EFS at 60 different catchments with aspect-controlled vegetation located across all continents except Antarctica. Our results show that an overwhelming majority of sites (70%) display seasonal reversal, associated with transitions from water-limited to energy-limited conditions during wet winters. These findings highlight the need to consider seasonal variations of aspect-driven vegetation patterns in ecohydrology, geomorphology, and Earth system models.", 
  "author": [
    {
      "family": "Kumari", 
      "given": " Nikul"
    }, 
    {
      "family": "Saco", 
      "given": " Patricia M."
    }, 
    {
      "family": "Rodriguez", 
      "given": " Jose F."
    }, 
    {
      "family": "Johnstone", 
      "given": " Samuel A."
    }, 
    {
      "family": "Srivastava", 
      "given": " Ankur"
    }, 
    {
      "family": "Chun", 
      "given": " Kwok P."
    }, 
    {
      "family": "Yetemen", 
      "given": " Omer"
    }
  ], 
  "container_title": "GEOPHYSICAL RESEARCH LETTERS", 
  "id": "4789", 
  "issue": "15", 
  "issued": {
    "date-parts": [
      [
        2020, 
        1, 
        1
      ]
    ]
  }, 
  "title": "The Grass Is Not Always Greener on the Other Side: Seasonal Reversal of Vegetation Greenness in Aspect-Driven Semiarid Ecosystems", 
  "type": "article-journal", 
  "volume": "47"
}