Khối tuyết cuộn tròn giữa cánh đồng Scotland

Khối tuyết cuộn tròn giữa cánh đồng Scotland


Những khối tuyết cuộn có hình dạng đặc biệt hình thành do gió thổi kết hợp với nhiều yếu tố tự nhiên khác.

Khối tuyết cuộn tròn giữa cánh đồng Scotland

Gió kết hợp với nhiều yếu tố tự nhiên tạo nên quả cầu tuyết đặc biệt. (Ảnh: BBC).

Một người dân chụp lại khối tuyết có hình dạng đặc biệt ở Glassford, Nam Lanarkshire, Scotland, BBC hôm 17/1 đưa tin. Đây chỉ là một trong rất nhiều khối tuyết cuộn xuất hiện trên những cánh đồng ở khu vực này.

“Gió thổi các tảng tuyết lăn trên mặt đất, cuối cùng tạo nên một quả cầu. Đó là quả cầu tuyết tự nhiên”, chuyên gia dự báo thời tiết Christopher Blanchett giải thích.

Khi lăn trên mặt đất, khối tuyết ngày càng dính nhiều tuyết hơn và dần tạo thành một khối trụ. Các khối tuyết cuộn rất đa dạng về kích thước, từ nhỏ như bóng tennis đến lớn như ôtô.

Điều kiện cần thiết để chúng hình thành là có tuyết dính, gió mạnh và nhiệt độ thấp. Người ta thường nhìn thấy các khối tuyết cuộn dưới chân đồi vì sườn dốc tạo điều kiện thuận lợi cho gió thổi tuyết lăn xuống.


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