Macquarie Island (54. S, 58. E) Macquarie Island

Macquarie Island (54.6 S, 158.8 E)

• Macquarie Island (54.6 S, 158.8 E)

Russell et al. (1998) identifies a ‘buffer layer’ above the boundary layer during ACE-1.

• Russell et al. (1998) identifies a ‘buffer layer’ above the boundary layer during ACE-1.

• Jensen et al. (2000) identifies an ‘intermediate layer’ above the boundary layer during SOCEX II.

Can we identify a ‘buffer layer’ in the soundings from Macquarie Island? What about the ECMWF operational analysis for the Year of Tropical Convection (YOTC)?

• Can we identify a ‘buffer layer’ in the soundings from Macquarie Island? What about the ECMWF operational analysis for the Year of Tropical Convection (YOTC)?

BL height: primary inv 0.01 K/m

• BL height: primary inv 0.01 K/m

• 84.4% of MAC

• 52.3% of YOTC

• MAC median = 1278 m

• MAC std = 624 m

• YOTC median = 1050 m

• YOTC std = 524 m

BL height: secondary (decoupled) inv: 0.005 K/m

• BL height: secondary (decoupled) inv: 0.005 K/m

• 66.6% of MAC

• 22.7% of YOTC

• MAC median = 680 m

• YOTC median = 734 m

Type 1: No significant inversion

• Type 1: No significant inversion

• Type 2: Single well mixed layer with

• 0.01 K/m

• Type 3: A ‘decoupled’ BL with no shear across 2nd inversion ( 0.005 K/m)

• Type 4: A ‘decoupled’ BL with shear over secondary inversion (I.e. ‘Buffer Layer’)