זה נשמע לא סביר, אבל במחקר שפורסם במארס השנה, חוקרים מצרפת ומארה"ב בחנו דיונות במדבריות בקטאר…

צוות אפוק | 23 באפריל 2022 | חדשות | 1 דק׳

האם ייתכן שדיונות חול נושמות?

זה נשמע לא סביר, אבל במחקר שפורסם במארס השנה, חוקרים מצרפת ומארה"ב בחנו דיונות במדבריות בקטאר והגיעו למסקנה שקיים בהן מנגנון המזכיר במעט את מנגנון הנשימה שלנו.

החוקרים בחנו את מנגנוני ספיחת ופליטת הלחות בשכבות העליונות של הדיונות והבחינו בדפוסים של גלים מחזוריים, אותם הם מקבילים למחזוריות הנשימה שלנו (כפי שנכתב בהודעה שפרסמה אוניברסיטת קורנל).

בחינת המנגנונים התבצעה באמצעות ציוד בדיקה רגיש ללחות. כך התגלה כי הלחות שבאוויר מחלחלת לתוך מעמקי הדיונה דרך נקבוביות הנוצרות בדיונה כאשר גרגירי החול נעים. במקרים רבים הדיונה שואפת לתוכה כמויות גבוהות מהצפוי של אדי לחות, שבהמשך נפלטים החוצה עם הרוח, ושוב "נשאפים" פנימה במחזור הבא.

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להמשך קריאה הירשמו או התחברו

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