Abstract
The hysteresis effect in diurnal cycles of net radiation Rn and ground heat flux G0 has been observed in many studies, while the governing mechanism remains vague. In this study, we link the phenomenology of hysteresis loops to the wave phase difference between the diurnal evolutions of various terms in the surface energy balance. Rn and G0 are parameterized with the incoming solar radiation and the surface temperature as two control parameters of the surface energy partitioning. The theoretical analysis shows that the vertical water flux W and the scaled ratio As*/AT* (net shortwave radiation to outgoing longwave radiation) play crucial roles in shaping hysteresis loops of Rn and G 0. Comparisons to field measurements indicate that hysteresis loops for different land covers can be well captured by the theoretical model, which is also consistent with Camuffo-Bernadi formula. This study provides insight into the surface partitioning and temporal evolution of the energy budget at the land surface. Key Points We physically characterize the hysteresis effect between Rn and G0Wave phase evolution dictates the pattern of hysteresis loopsModel predictions are consistent with field measurements and empirical models
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1741-1747 |
| Number of pages | 7 |
| Journal | Geophysical Research Letters |
| Volume | 40 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 16 2013 |
Fingerprint
Keywords
- Hysteresis effect
- Soil water
- Surface Energy Budgets
- Wave phase
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
Cite this
Revisiting the hysteresis effect in surface energy budgets. / Sun, Ting; Wang, Zhihua; Ni, Guang Heng.
In: Geophysical Research Letters, Vol. 40, No. 9, 16.05.2013, p. 1741-1747.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Revisiting the hysteresis effect in surface energy budgets
AU - Sun, Ting
AU - Wang, Zhihua
AU - Ni, Guang Heng
PY - 2013/5/16
Y1 - 2013/5/16
N2 - The hysteresis effect in diurnal cycles of net radiation Rn and ground heat flux G0 has been observed in many studies, while the governing mechanism remains vague. In this study, we link the phenomenology of hysteresis loops to the wave phase difference between the diurnal evolutions of various terms in the surface energy balance. Rn and G0 are parameterized with the incoming solar radiation and the surface temperature as two control parameters of the surface energy partitioning. The theoretical analysis shows that the vertical water flux W and the scaled ratio As*/AT* (net shortwave radiation to outgoing longwave radiation) play crucial roles in shaping hysteresis loops of Rn and G 0. Comparisons to field measurements indicate that hysteresis loops for different land covers can be well captured by the theoretical model, which is also consistent with Camuffo-Bernadi formula. This study provides insight into the surface partitioning and temporal evolution of the energy budget at the land surface. Key Points We physically characterize the hysteresis effect between Rn and G0Wave phase evolution dictates the pattern of hysteresis loopsModel predictions are consistent with field measurements and empirical models
AB - The hysteresis effect in diurnal cycles of net radiation Rn and ground heat flux G0 has been observed in many studies, while the governing mechanism remains vague. In this study, we link the phenomenology of hysteresis loops to the wave phase difference between the diurnal evolutions of various terms in the surface energy balance. Rn and G0 are parameterized with the incoming solar radiation and the surface temperature as two control parameters of the surface energy partitioning. The theoretical analysis shows that the vertical water flux W and the scaled ratio As*/AT* (net shortwave radiation to outgoing longwave radiation) play crucial roles in shaping hysteresis loops of Rn and G 0. Comparisons to field measurements indicate that hysteresis loops for different land covers can be well captured by the theoretical model, which is also consistent with Camuffo-Bernadi formula. This study provides insight into the surface partitioning and temporal evolution of the energy budget at the land surface. Key Points We physically characterize the hysteresis effect between Rn and G0Wave phase evolution dictates the pattern of hysteresis loopsModel predictions are consistent with field measurements and empirical models
KW - Hysteresis effect
KW - Soil water
KW - Surface Energy Budgets
KW - Wave phase
UR - http://www.scopus.com/inward/record.url?scp=84879090345&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879090345&partnerID=8YFLogxK
U2 - 10.1002/grl.50385
DO - 10.1002/grl.50385
M3 - Article
VL - 40
SP - 1741
EP - 1747
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 9
ER -