Monthly and diurnal surface temperature variations in the vicinity of Kastamonu City

Büşra Kırcı; Erkan Yilmaz

Makale detayları

Monthly and diurnal surface temperature variations in the vicinity of Kastamonu City

Yazarlar:

Büşra Kırcı | Erkan Yilmaz

Yayıncı:

Kastamonu University

Ana Başlıklar:

Beşeri Coğrafya (Diğer)

Dergi:

Kastamonu İnsan ve Toplum Dergisi Vol.2 Issue 4, pp.187-222

Belge Tipi:

Makale

Yayın Tarihi:

1/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001327424

pISSN:

3023-5243

Anahtar kelimeler:

Özet:

 In addition to the global temperature increase, the fact that urbanization activities continue unabated has caused attention to be focused on urban heat islands in recent years. Urban heat islands can be determined through satellite images as well as meteorological measurements. The thermal infrared bands of satellite imagery record the energy emitted from a city and provide continuous data on a surface. In this study, surface temperature models were created for an area encompassing Kastamonu city center and its immediate surroundings. Monthly models were derived from LANDSAT, and one-day models were obtained from LANDSAT-ASTER imagery. Monthly variations were reported at the neighborhood scale, and averages for the study area, total urban neighborhood area, and the urban area were calculated and compared. Diurnal variation was assessed in relation to land cover in 2 profiles oriented roughly N-S and E-W. Accordingly, the general conclusions are as follows: 1 In winter, the city center is cooler than its surroundings, 2 nevertheless, of the 2 similar areas, one urban and one naturally landscaped, the urban area is warmer throughout the year, 3 the largest diurnal differences are in urban components, while the smallest differences are in natural landscape components such as water bodies and forests, 4 as the surface heterogeneity increases, it is determined that the energy is evenly distributed and temperature differences become smaller. The urbansurface heat island effect starts to develop in April and May, becomes most severe in June and continues in a fading form until the beginning of October.

 In addition to the global temperature increase, the fact that urbanization activities continue unabated has caused attention to be focused on urban heat islands in recent years. Urban heat islands can be determined through satellite images as well as meteorological measurements. The thermal infrared bands of satellite imagery record the energy emitted from a city and provide continuous data on a surface. In this study, surface temperature models were created for an area encompassing Kastamonu city center and its immediate surroundings. Monthly models were derived from LANDSAT, and one-day models were obtained from LANDSAT-ASTER imagery. Monthly variations were reported at the neighborhood scale, and averages for the study area, total urban neighborhood area, and the urban area were calculated and compared. Diurnal variation was assessed in relation to land cover in 2 profiles oriented roughly N-S and E-W. Accordingly, the general conclusions are as follows: 1 In winter, the city center is cooler than its surroundings, 2 nevertheless, of the 2 similar areas, one urban and one naturally landscaped, the urban area is warmer throughout the year, 3 the largest diurnal differences are in urban components, while the smallest differences are in natural landscape components such as water bodies and forests, 4 as the surface heterogeneity increases, it is determined that the energy is evenly distributed and temperature differences become smaller. The urbansurface heat island effect starts to develop in April and May, becomes most severe in June and continues in a fading form until the beginning of October.

 In addition to the global temperature increase, the fact that urbanization activities continue unabated has caused attention to be focused on urban heat islands in recent years. Urban heat islands can be determined through satellite images as well as meteorological measurements. The thermal infrared bands of satellite imagery record the energy emitted from a city and provide continuous data on a surface. In this study, surface temperature models were created for an area encompassing Kastamonu city center and its immediate surroundings. Monthly models were derived from LANDSAT, and one-day models were obtained from LANDSAT-ASTER imagery. Monthly variations were reported at the neighborhood scale, and averages for the study area, total urban neighborhood area, and the urban area were calculated and compared. Diurnal variation was assessed in relation to land cover in 2 profiles oriented roughly N-S and E-W. Accordingly, the general conclusions are as follows: 1 In winter, the city center is cooler than its surroundings, 2 nevertheless, of the 2 similar areas, one urban and one naturally landscaped, the urban area is warmer throughout the year, 3 the largest diurnal differences are in urban components, while the smallest differences are in natural landscape components such as water bodies and forests, 4 as the surface heterogeneity increases, it is determined that the energy is evenly distributed and temperature differences become smaller. The urbansurface heat island effect starts to develop in April and May, becomes most severe in June and continues in a fading form until the beginning of October.

 Küresel sıcaklığın artışıyla birlikte şehirleşme faaliyetlerinin hız kesmeden devam ediyor olması son yıllarda şehir ısı adaları üzerine dikkatlerin yoğunlaşmasına neden olmuştur. Şehir ısı adası meteorolojik ölçümlerle belirlenebileceği gibi uydu görüntüleri vasıtasıyla da incelenebilir. Uydu görüntülerinin termal kızılötesi bantları bir şehirden yayılan enerjinin kaydını tutar ve bir yüzeye ait sürekli veri sunar. Bu çalışmada Kastamonu şehir merkezini ve yakın çevresini kapsayan bir alanda yüzey sıcaklık modelleri oluşturulmuştur. Aylık modeller LANDSAT ve bir günlük model LANDSAT-ASTER görüntülerinden türetilmiştir. Aylık değişimler mahalleler ölçeğinde aktarılmış, çalışma alanı, şehirsel mahallelerin toplam alanı ve şehirsel alan için ortalamalar hesaplanmış ve birbirleriyle karşılaştırılmıştır. Günlük değişim gündüz-gece, kabaca K-G ve D-B doğrultulu 2 profilde arazi örtüsüyle ilişkilendirilerek incelenmiştir. Buna göre ulaşılan genel hususlar şöyledir: 1 Kış mevsiminde şehir merkezi çevresine göre daha serindir, 2 bununla birlikte biri şehir diğeri doğal peyzajlı 2 aynı alandan, şehir olanı yıl boyunca daha sıcaktır, 3 gündüz-gece arasındaki en büyük sıcaklık farkları şehirsel bileşenlerde, en küçük farklar su kütlesi ve orman gibi doğal peyzaj bileşenlerindedir, 4 yüzey heterojenliği arttıkça enerjinin dengeli bir şekilde dağıldığı ve sıcaklık farklarının küçüldüğü belirlenir. Nisan ve mayısta gelişmeye başlayan şehiryüzey ısı adası etkisi haziranda en şiddetli hale gelerek ekim başına kadar hafifleyerek devam eder.

Makale detayları

Monthly and diurnal surface temperature variations in the vicinity of Kastamonu City

Yazarlar:

Büşra Kırcı | Erkan Yilmaz

Yayıncı:

Kastamonu University

Ana Başlıklar:

Beşeri Coğrafya (Diğer)

Dergi:

Kastamonu İnsan ve Toplum Dergisi Vol.2 Issue 4, pp.187-222

Belge Tipi:

Makale

Yayın Tarihi:

1/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001327424

pISSN:

3023-5243

satellite data

land surface temperature

urban heat island

surface heat island

diurnal variationsuydu görüntüsü

yüzey sıcaklığı

şehir ısı adası

yüzey ısı adası

günlük değişim

Sayı

Makale detayları

Yazarlar: Büşra Kırcı | Erkan Yilmaz

Yayıncı: Kastamonu University

Ana Başlıklar: Beşeri Coğrafya (Diğer)

Dergi: Kastamonu İnsan ve Toplum Dergisi Vol.2 Issue 4, pp.187-222

Belge Tipi: Makale

Yayın Tarihi: 1/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001327424

pISSN: 3023-5243

Sayı

Yazarlar:

Büşra Kırcı | Erkan Yilmaz

Yayıncı:

Kastamonu University

Ana Başlıklar:

Beşeri Coğrafya (Diğer)

Dergi:

Kastamonu İnsan ve Toplum Dergisi Vol.2 Issue 4, pp.187-222

Belge Tipi:

Makale

Yayın Tarihi:

1/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001327424

pISSN:

3023-5243