Temporary reduction in fine particulate matter due to ‘anthropogenic emissions switch-off’ during COVID-19 lockdown in Indian cities

Abstract

The COVID-19 pandemic elicited a global response to limit associated mortality, with social distancing and lockdowns being imposed. In India, human activities were restricted from late March 2020. This ‘anthropogenic emissions switch-off’ presented an opportunity to investigate impacts of COVID-19 mitigation measures on ambient air quality in five Indian cities (Chennai, Delhi, Hyderabad, Kolkata, and Mumbai), using in-situ measurements from 2015 to 2020. For each year, we isolated, analysed and compared fine particulate matter (PM2.5) concentration data from 25 March to 11 May, to elucidate the effects of the lockdown. Like other global cities, we observed substantial reductions in PM2.5 concentrations, from 19 to 43% (Chennai), 41–53% (Delhi), 26–54% (Hyderabad), 24–36% (Kolkata), and 10–39% (Mumbai). Generally, cities with larger traffic volumes showed greater reductions. Aerosol loading decreased by 29% (Chennai), 11% (Delhi), 4% (Kolkata), and 1% (Mumbai) against 2019 data. Health and related economic impact assessments indicated 630 prevented premature deaths during lockdown across all five cities, valued at 0.69 billion USD. Improvements in air quality may be considered a temporary lockdown benefit as revitalising the economy could reverse this trend. Regulatory bodies must closely monitor air quality levels, which currently offer a baseline for future mitigation plans.

References 110

1. 1.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

2. 2.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

3. 3.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

4. 4.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

5. 5.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

6. 6.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

7. 7.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

8. 8.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

9. 9.

   This reference’s wording can’t be shown under the paper’s licence.

   Not in our library

10. 10.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

11. 11.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

12. 12.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

13. 13.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

14. 14.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

15. 15.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

16. 16.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

17. 17.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

18. 18.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

19. 19.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

20. 20.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

21. 21.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

22. 22.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

23. 23.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

24. 24.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

25. 25.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

26. 26.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

27. 27.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

28. 28.
    The impact of air pollution on deaths, disease burden, and life expectancy across the states of India: the Global Burden of Disease Study 2017 · 2019

    No notice
29. 29.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

30. 30.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

31. 31.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

32. 32.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

33. 33.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

34. 34.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

35. 35.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

36. 36.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

37. 37.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

38. 38.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

39. 39.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

40. 40.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

41. 41.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

42. 42.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

43. 43.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

44. 44.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

45. 45.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

46. 46.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

47. 47.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

48. 48.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

49. 49.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

50. 50.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

51. 51.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

52. 52.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

53. 53.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

54. 54.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

55. 55.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

56. 56.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

57. 57.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

58. 58.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

59. 59.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

60. 60.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

61. 61.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

62. 62.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

63. 63.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

64. 64.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

65. 65.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

66. 66.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

67. 67.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

68. 68.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

69. 69.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

70. 70.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

71. 71.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

72. 72.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

73. 73.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

74. 74.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

75. 75.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

76. 76.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

77. 77.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

78. 78.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

79. 79.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

80. 80.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

81. 81.
    The Response in Air Quality to the Reduction of Chinese Economic Activities During the COVID‐19 Outbreak · 2020

    No notice
82. 82.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

83. 83.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

84. 84.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

85. 85.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

86. 86.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

87. 87.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

88. 88.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

89. 89.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

90. 90.
    Enhanced secondary pollution offset reduction of primary emissions during COVID-19 lockdown in China · 2020

    No notice
91. 91.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

92. 92.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

93. 93.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

94. 94.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

95. 95.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

96. 96.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

97. 97.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

98. 98.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

99. 99.

    This reference’s wording can’t be shown under the paper’s licence.

    Not in our library

100. 100.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

101. 101.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

102. 102.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

103. 103.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

104. 104.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

105. 105.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

106. 106.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

107. 107.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

108. 108.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

109. 109.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

110. 110.

     This reference’s wording can’t be shown under the paper’s licence.

     Not in our library

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• Nitrogen oxides concentration and emission change detection during COVID-19 restrictions in North India · 2021
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• Air Pollution, Climate Change, and Human Health in Indian Cities: A Brief Review · 2021
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• Health and economic impact of air pollution in the states of India: the Global Burden of Disease Study 2019 · 2021
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